Canon G620 (G550/G650/G620) printer: disappointed with the resolution

pulsar123

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I just purchased my first photo printer, Canon G620 (G550/G650/G620), in part thanks to a large number of very positive reviews, including this site. In particular, people often describe the print quality as comparable or better than the one you can get in a shop. And my intention was to use it as a substitute to ordering from a shop.

My first impressions: the colors seem to be good, though I will have to teak the white balance a bit as grey in my X-rite color target prints a bit warmer (and pinkier) than it should. For example, when my target grey is 6600K, +22 (ACR), the Canon Paper Plus Glossy II prints as 7350K, +14, and Canon Paper Glossy as 8200K, +12.

But colors are fixable. My biggest grip is the fuzziness of the prints - even when I set it to custom, maximum (Fine=1) quality setting. I could already see the fuzziness with my naked eye (rather obvious), and then decided to explore this further, by taking a macro (4:1) photos of the print.

Here is the result. The pixel size here is 1.72 um, the area is 1.4 mm^2. On the left is a print made in a shop (Costco Fujitsu printer, 300 dpi native resolution). On the right is the print made with my Canon G620 at the highest quality setting. The difference is pretty dramatic. While the color unevenness is almost non-existent in the Fujitsu prints, in G620 it is rather extreme - colors are represented by dots of 20 um diameter (corresponds to 1200 dpi), separated by much larger distances. In my tests, I have to blur the scans from the G620 prints with a Gaussian with the radius of 50 um to get rid of the fuzziness. The resulting blur diameter (100 um) corresponds to 230 dpi. So the actual resolution of G620 prints is more like 230 dpi, much less than the specified "1200x4800 dpi".

Is anyone else really bothered by the fuzziness of the prints from Canon G6*0 printers?

6a24de41841b41d492bb63d4c4c91a25.jpg

An element of of a 4x6 photo (shot on a 20-megapixel camera, Canon 6D) printed on G620, then scanned at 1200 dpi (left: G620; right: original digital image):

1ca4f21e1b3c42d9a384f26579185c4b.jpg
 
You have blinded me a bit by the 'science & measurements'....

Can I ask have actually taken a picture (not a picture of a picture & scanned?) and created a print ready file (1800px x 1200px @300ppi) and seen how well that prints on 6 x 4 inch photo paper???

FWIW when prepared as I describe including output sharpening for inkjet printing my very humble Canon TS8250 produces very acceptably sharp and accurate colours to lab printed colour prints.
 
While the G620 et al series may not be the same caliber as the TS/TR or iP series, I expect it will produce excellent prints. I have an older Canon MG6220. The prints are nothing short of superb.

1. Look up Keith Cooper on YouTube and view his series on this printer family.

https://www.youtube.com/c/KeithCooper/search?query=Canon G620

2. Download a known test image from Keith Cooper's Northlight Images web site and use that as your trial. If you have 8-/12 x 11 (or equivalent) photo paper, use that. The test images will have enough pixels to produce a letter size print at the needed resolution. Don't mess with 4x6 inch mini prints.

https://www.northlight-images.co.uk/printer-test-images/

The Datacolor and Outback ones are excellent. Start with Printer Manages Color and if you are on Windows, make sure you are not double profiling. Don't over-analyze. Most of us look at prints with eyes wide open at reasonable distances, not loupes. If the printer is performing well, it will be obvious.

Good luck.
 
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You have blinded me a bit by the 'science & measurements'....

Can I ask have actually taken a picture (not a picture of a picture & scanned?) and created a print ready file (1800px x 1200px @300ppi) and seen how well that prints on 6 x 4 inch photo paper???

FWIW when prepared as I describe including output sharpening for inkjet printing my very humble Canon TS8250 produces very acceptably sharp and accurate colours to lab printed colour prints.
I started looking into fuzziness of G620 prints because first I printed a few "normal" (not test) 4x6 images (you see a head shot element from that image in my OP), and these looked significantly less sharp than what I was used to from printing at Costco. Then I spent quite a bit of time fine tuning the settings, thinking that perhaps I am doing something wrong. At the end I realized it's not me, it's just the way these printers work, and my macro shots were just to confirm what I already figured. (Also, it was fun - to see what exactly the printer is doing, at macroscopic level.)

Don't get me wrong - the printer is great, one just needs to know its limitations. And one of the limitations - don't expect a lab quality from 4x6 photos. I am sure larger prints will look much better.
 
Then the prints should look even better.

I still advise printing some test images. I've done them at 5x7.
 
You have blinded me a bit by the 'science & measurements'....

Can I ask have actually taken a picture (not a picture of a picture & scanned?) and created a print ready file (1800px x 1200px @300ppi) and seen how well that prints on 6 x 4 inch photo paper???

FWIW when prepared as I describe including output sharpening for inkjet printing my very humble Canon TS8250 produces very acceptably sharp and accurate colours to lab printed colour prints.
I started looking into fuzziness of G620 prints because first I printed a few "normal" (not test) 4x6 images (you see a head shot element from that image in my OP), and these looked significantly less sharp than what I was used to from printing at Costco. Then I spent quite a bit of time fine tuning the settings, thinking that perhaps I am doing something wrong. At the end I realized it's not me, it's just the way these printers work, and my macro shots were just to confirm what I already figured. (Also, it was fun - to see what exactly the printer is doing, at macroscopic level.)

Don't get me wrong - the printer is great, one just needs to know its limitations. And one of the limitations - don't expect a lab quality from 4x6 photos. I am sure larger prints will look much better.
I surmise that Costco will automatically apply (significant?) sharpening to the image files as part of their printing process.

If you are not sharpening as part of your PP workflow then that is something to consider.

NB I shoot raw and sharpening is part of capture and output workflow, whether printed by me, Giclee printed by a commercial printer or even greetings cards printed digitally using a Contone process. Each needs carefull IMO consideration to the final file(s) I need to create ;)

--
Living life a slice at a time
http://www.1stdesignit.co.uk/350d/burnup2.gif
 
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You have blinded me a bit by the 'science & measurements'....

Can I ask have actually taken a picture (not a picture of a picture & scanned?) and created a print ready file (1800px x 1200px @300ppi) and seen how well that prints on 6 x 4 inch photo paper???

FWIW when prepared as I describe including output sharpening for inkjet printing my very humble Canon TS8250 produces very acceptably sharp and accurate colours to lab printed colour prints.
I started looking into fuzziness of G620 prints because first I printed a few "normal" (not test) 4x6 images (you see a head shot element from that image in my OP), and these looked significantly less sharp than what I was used to from printing at Costco. Then I spent quite a bit of time fine tuning the settings, thinking that perhaps I am doing something wrong. At the end I realized it's not me, it's just the way these printers work, and my macro shots were just to confirm what I already figured. (Also, it was fun - to see what exactly the printer is doing, at macroscopic level.)

Don't get me wrong - the printer is great, one just needs to know its limitations. And one of the limitations - don't expect a lab quality from 4x6 photos. I am sure larger prints will look much better.
I surmise that Costco will automatically apply (significant?) sharpening to the image files as part of their printing process.

If you are not sharpening as part of your PP workflow then that is something to consider.

NB I shoot raw and sharpening is part of capture and output workflow, whether printed by me, Giclee printed by a commercial printer or even greetings cards printed digitally using a Contone process. Each needs carefull IMO consideration to the final file(s) I need to create ;)
I print at Costco with all PP disabled. Besides, my own images are plenty sharp, sharpening them even further won't make any difference, as G620 is the weak link here.
 
Watch some of Keith's videos. Look at his output. If the printer were less than great, he would say so.

Run nozzle check and at least one basic cleaning. And if it still doesn't seem right, I would contact Canon Support.
 
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Watch some of Keith's videos. Look at his output. If the printer were less than great, he would say so.

Run nozzle check and at least one basic cleaning. And if it still doesn't seem right, I would contact Canon Support.
@pulsar123

Yup, he is always worth a watch

Canon G550 printer review A4 6 ink MegaTank printer. Printing test for G620/G650 - YouTube

Also, he is quite approachable with any questions that arise.

--
Living life a slice at a time
http://www.1stdesignit.co.uk/350d/burnup2.gif
 
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Watch some of Keith's videos. Look at his output. If the printer were less than great, he would say so.

Run nozzle check and at least one basic cleaning. And if it still doesn't seem right, I would contact Canon Support.
@pulsar123

Yup, he is always worth a watch

Canon G550 printer review A4 6 ink MegaTank printer. Printing test for G620/G650 - YouTube

Also, he is quite approachable with any questions that arise.
From Keith Cooper review :

"The dot pattern with this printer is relatively coarse but not something most people are ever going to spot".

I guess I am not in this "most people" category :) . But he did note the issue. I suspect a majority of people reviewing this printer are heavily focused on the color gamut and accuracy, and indeed this is where the printer shines. I just wish the printer could do both (resolution and colors).
 
I just purchased my first photo printer, Canon G620 (G550/G650/G620) ....
which is a very good time to suspect that any problems are far more likely to be user errors instead of equipment defects, especially where there are
a large number of very positive reviews, including this site. In particular, people often describe the print quality as comparable or better than the one you can get in a shop. And my intention was to use it as a substitute to ordering from a shop.
On the substance:
My first impressions: the colors seem to be good, though I will have to teak the white balance a bit as grey in my X-rite color target prints a bit warmer (and pinkier) than it should. For example, when my target grey is 6600K, +22 (ACR), the Canon Paper Plus Glossy II prints as 7350K, +14, and Canon Paper Glossy as 8200K, +12.
If you said what software you're using to print, I missed it, please tell us. If you've indicated that you know how to select the right ICC profile, I missed it, please tell us and elaborate. I suspect whatever settings you're using are not the ones needed to get neutral color.
My biggest grip is the fuzziness of the prints - even when I set it to custom, maximum (Fine=1) quality setting. I could already see the fuzziness with my naked eye (rather obvious), and then decided to explore this further, by taking a macro (4:1) photos of the print.

Here is the result. The pixel size here is 1.72 um, the area is 1.4 mm^2. On the left is a print made in a shop (Costco Fujitsu printer, 300 dpi native resolution). On the right is the print made with my Canon G620 at the highest quality setting.

6a24de41841b41d492bb63d4c4c91a25.jpg
Agreed that doesn't look good. There's no reason you should be seeing individual ink droplets if the G620's driver is set to the media type for Canon photo paper, you in fact print on that paper, and you have the highest photo quality set. But again, I'm going 97% this is some problem with settings, not the printer.

So: what operating system are you using, what software are you using to print, and what printer driver settings are you using (maybe even screen-cap and post the dialog box)?
 
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Pixma Pro-200 (dye) printer: 4800 X 2400 DPI.

ImageProGraf Pro-1000 (pigment): 2400X 1200

G620 (dye): 1200 X 600.

You'd have to view the print at less than 6" to resolve 600DPI. As a pixel requires more than one dot, I suppose that some color structure could be visible at more normal viewing distances, if the dithering scheme used by the printer isn't the best.

I'm not sure that I understand the first post. The square image is 1.18mm on a side? (That'd give 1.4 square mm.) At 600 dpi, that would give 28 dots in the low-resolution axis. If it's really 1.4 X 1.4 mm, 32.6 dots.
 
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Pixma Pro-200 (dye) printer: 4800 X 2400 DPI.

ImageProGraf Pro-1000 (pigment): 2400X 1200

G620 (dye): 1200 X 600.
No, the G620 prints up to 4800x1200 dpi. See, e.g., https://www.usa.canon.com/internet/...nters/all-megatank-inkjet-printers/pixma-g620.

As for parsing the rest of what the OP wrote, at a minimum it is not in the terminology normally used. The point is that the ink droplets used for 4800x1200 dpi printing are small enough not to be visible to a normal human naked eye. Indeed, the whole notion that we can simulate continuous color tone--at a minimum several hundred thousand discreet colors--with only 4, 5, 6, or even 11 colors of ink depends on this being true. And the common experience is, it is true.
 
Pixma Pro-200 (dye) printer: 4800 X 2400 DPI.

ImageProGraf Pro-1000 (pigment): 2400X 1200

G620 (dye): 1200 X 600.
No, the G620 prints up to 4800x1200 dpi. See, e.g., https://www.usa.canon.com/internet/...nters/all-megatank-inkjet-printers/pixma-g620.

As for parsing the rest of what the OP wrote, at a minimum it is not in the terminology normally used. The point is that the ink droplets used for 4800x1200 dpi printing are small enough not to be visible to a normal human naked eye. Indeed, the whole notion that we can simulate continuous color tone--at a minimum several hundred thousand discreet colors--with only 4, 5, 6, or even 11 colors of ink depends on this being true. And the common experience is, it is true.
Thanks for the correction. Looks like the other numbers are the Canon specs.

Assuming the OP's 1.72 micron pixel size is correct, the ink dots are roughly 20 microns in diameter, based on counting pixels in the image (11). About the same as a 1200DPI pitch. 66 steps across a 1.4mm image. Seems about right, from the image.

The individual dots may not be resolved by the eye, but the printer must use some strategy to avoid producing structure in light colored areas, where the dot density must be low. I presume that it's some sort of dithering scheme.
 
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Pixma Pro-200 (dye) printer: 4800 X 2400 DPI.

ImageProGraf Pro-1000 (pigment): 2400X 1200

G620 (dye): 1200 X 600.
No, the G620 prints up to 4800x1200 dpi. See, e.g., https://www.usa.canon.com/internet/...nters/all-megatank-inkjet-printers/pixma-g620.

As for parsing the rest of what the OP wrote, at a minimum it is not in the terminology normally used. The point is that the ink droplets used for 4800x1200 dpi printing are small enough not to be visible to a normal human naked eye. Indeed, the whole notion that we can simulate continuous color tone--at a minimum several hundred thousand discreet colors--with only 4, 5, 6, or even 11 colors of ink depends on this being true. And the common experience is, it is true.
Thanks for the correction. Looks like the other numbers are the Canon specs.

Assuming the OP's 1.72 micron pixel size is correct, the ink dots are roughly 20 microns in diameter, based on counting pixels in the image (11). About the same as a 1200DPI pitch. 66 steps across a 1.4mm image. Seems about right, from the image.

The individual dots may not be resolved by the eye, but the printer must use some strategy to avoid producing structure in light colored areas, where the dot density must be low. I presume that it's some sort of dithering scheme.


You didn't have to count the dots - in my OP I already provided accurate measurements, and the dot diameter is indeed 20 um (1200 dpi as I have noted).

I can clearly see fuzziness with my naked eye (which wasn't the case for professionally printed photos - hence my complaining), but I may be a special case. As I have a fairly strong shortsightedness, my sharp viewing distance is 10 cm - 2.5x shorter than for people with good vision, so I can see 2.5x smaller details.

But more important point is that many people (like myself) buy printers not just for viewing, but as a backup archiving method - if something goes really wrong and all digital copies are lost, at least one can recover images by scanning old photos. For this use, G620 (and I am sure pretty much all non-pro inkjet printers) is not particularly good, because of the dithering mechanism they use.

The printer is not actually much lower resolution than pro printers - as my head shot example below shows, once the scan is blurred enough (blur diameter of 0.1mm - 230 dpi), colors look pretty smooth. And perhaps as the photos age, ink diffusion will eventually result in a pro-like print quality :)



d504ea2686ce4c3dbcce046399e05753.jpg



On a different topic - I had quite obvious tinting in my prints. I printed ~10 X-rite color targets yesterday, while changing the tint in the printer driver settings, and ended up getting almost perfect white balance for all grey patches after setting Magenta to -14 and Yellow to +4 (the total range for both: -50 to +50).

I wonder if this is normal? Ideally, I'd like to profile my printer (I already profile my monitor and camera), but not willing to shell out $500+ for a single calibration. Can anyone suggest a reasonably priced online shop which does good calibrations (you print their target, mail it to them, they scan it and send you the icc file)? May be something in Canada, or US?
 
I just purchased my first photo printer, Canon G620 (G550/G650/G620) ....
which is a very good time to suspect that any problems are far more likely to be user errors instead of equipment defects, especially where there are
a large number of very positive reviews, including this site. In particular, people often describe the print quality as comparable or better than the one you can get in a shop. And my intention was to use it as a substitute to ordering from a shop.
On the substance:
My first impressions: the colors seem to be good, though I will have to teak the white balance a bit as grey in my X-rite color target prints a bit warmer (and pinkier) than it should. For example, when my target grey is 6600K, +22 (ACR), the Canon Paper Plus Glossy II prints as 7350K, +14, and Canon Paper Glossy as 8200K, +12.
If you said what software you're using to print, I missed it, please tell us. If you've indicated that you know how to select the right ICC profile, I missed it, please tell us and elaborate. I suspect whatever settings you're using are not the ones needed to get neutral color.
My biggest grip is the fuzziness of the prints - even when I set it to custom, maximum (Fine=1) quality setting. I could already see the fuzziness with my naked eye (rather obvious), and then decided to explore this further, by taking a macro (4:1) photos of the print.

Here is the result. The pixel size here is 1.72 um, the area is 1.4 mm^2. On the left is a print made in a shop (Costco Fujitsu printer, 300 dpi native resolution). On the right is the print made with my Canon G620 at the highest quality setting.

6a24de41841b41d492bb63d4c4c91a25.jpg
Agreed that doesn't look good. There's no reason you should be seeing individual ink droplets if the G620's driver is set to the media type for Canon photo paper, you in fact print on that paper, and you have the highest photo quality set. But again, I'm going 97% this is some problem with settings, not the printer.

So: what operating system are you using, what software are you using to print, and what printer driver settings are you using (maybe even screen-cap and post the dialog box)?


Thanks for looking into this. I am pretty scientific about this stuff (in fact, I do have a PhD - in astrophysics), and I wouldn't post this until I have exhausted checking all the potential culprits. I do calibrate my monitor and camera. Printing was done from Photoshop (under Windows), I made sure I am not double-correcting (I tried both printer OR Photoshop doing color correction, not both; same result). I set the finest quality setting (1) in the printer's driver.

Macro photography is my hobby, so the next obvious step was taking an extreme macro shot of both G620 print and a pro photo. And that macro photo explained everything - G620 does use a kind of dithering which is fairly obvious (to my eyes), even though the effective resolution is pretty good (I estimated it at 230 dpi - once I blur the scan to that degree, dithering artifacts are gone).

My original post is less about trying to make sure I am not doing something wrong (at this point I am 95% sure I am not), but rather as a warning to others that this printer does have some limitations, when compared to photos printed in a (good) shop. At the end of the day, it is still a very good photo printer, the best out there in this price range.
 
I found the specs for the Costco print (on the left side; G620 print is on the right side): Printer: Fuji Frontier LP 5700, Fuji Crystal Archive Paper. It's a totally different technology (laser printing), so not really fair to compare. On the other hand, price-wise the prints are comparable, so it's important to know.
 
I would contact Canon support. Yes, this printer might not be top of the line , but the results should be better. Watch Keith Cooper's extensive series of videos on this printer. Yes, he noted "issues" but his output was better than what you are experiencing, or he would said so.

when compared to photos printed in a (good) shop

What shop? What printer are they using? I think I can achieve as good 4x6 photos on my home printers as are available commercially. Show us a few examples of output. Just a photo of a photo would work. Try those test images. Thanks.

I'm tending to Epson for tank printers. They have more experience with it so far and you can run other types of inks in Epson printers.
 
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I would contact Canon support. Yes, this printer might not be top of the line , but the results should be better. Watch Keith Cooper's extensive series of videos on this printer. Yes, he noted "issues" but his output was better than what you are experiencing, or he would said so.

when compared to photos printed in a (good) shop

What shop? What printer are they using? I think I can achieve as good 4x6 photos on my home printers as are available commercially. Show us a few examples of output. Just a photo of a photo would work. Try those test images. Thanks.

I'm tending to Epson for tank printers. They have more experience with it so far and you can run other types of inks in Epson printers.
My comparison was with the Costco printer - Fuji Frontier LP 5700, Fuji Crystal Archive Paper. It's a laser printer.
 

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