Pretty good on the s75. I tried matching a digitally zoomed image with a non DZ image and blown up the non-DZ in PS Elements to match the magnification. The digital zoom is much cleaner than trying to zoom in PS Elements. It might come in handy if I'm in a pinch. That is until I get a good teleconverter.--Alika
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Digital Zoom Is Actually...
- Thread starter kra
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fg
Leading Member
I would be very surprised it this were true. Did you actually resize the file, not just zoom in?
I didn't touch either file. I just brought them into PS Elements, tiled the display so that they were side by side, and zoomed in so that I could see visible differences in the detail. Edge detail in particular is very clean in DZ versus software zoom. Try it. The DZ was zoomed to 300% and the non-DZ was zoomed 500%. The non-DZ is actually not quite as zoomed as the DZ, but the non-DZ already looks pretty bad compared to the DZ image.
I believe this. I have a theory about digital zoom and the size of internal raw data. Unless I'm asked, I wouldn't go into the route again. But anyway, S75 has 14 bit right ? The digital zoom will benefit greatly ! Up to 150%, the digital zoom should be better than PS blow-up.
Now, that said, however, the PS blow-up shouldn't be noticeably worse. Are you using bicubic interpolation option ? You should.
For the record, I state that S75 should be beter than S70/F505V in digital zoom category.
Now, that said, however, the PS blow-up shouldn't be noticeably worse. Are you using bicubic interpolation option ? You should.
For the record, I state that S75 should be beter than S70/F505V in digital zoom category.
I'm just hitting ctrl+ to zoom in. I'm not sure what the default method in PS Elements is. Another thing a noticed, DZ eliminates CA on branches with bright backgrounds.
It's very difficult for me to come up with a theory to explain that DZ eliminates CA.
S
Scott Solanik
Guest
Have you looked around yet for a good Tele?
Im still debating on the Olympus B300 and the Eagle Eye 5X
I've heard good comments on both.
Scott
Well its probably not true CA, but it seems everyone calls any abnormality CA now a days. What I was refering to was the typical dark tree branches against a light background. DZ is superior no question about it. It really cleans up the borders of contrasting pixels.
But, as I said, DZ is only a temporary solution until I get a teleconverter which will probably be the B-300. I was just curious how "bad" DZ would be, and, as it turns out, the in camera processing seems really good.
But, as I said, DZ is only a temporary solution until I get a teleconverter which will probably be the B-300. I was just curious how "bad" DZ would be, and, as it turns out, the in camera processing seems really good.
shwen41638
Well-known member
Aika,
Can you post a screen capture of the 2 images side-by-side so we can have a look? Thanks.
Cheers,
shwen
Can you post a screen capture of the 2 images side-by-side so we can have a look? Thanks.
Cheers,
shwen
John Rothlisberger47352
Member
Hitting Ctrl-+ and resizing are two totally different things. Zooming in just makes the pixels bigger on screen (like using a magnifying glass). Resizing actually creates new pixels, and both the camera and PhotoShop do this. How they do it is where the "quality" (or lack thereof) comes in. No matter which way you look at it, you are creating data from thin air - don't do it.
Just my $0.02
CA is always worse near the edges of the image from the lens. Digital Zoom works by taking the center of the image and digitally expanding it. Since only the center of the lens image is used during DZ, the CA is much less noticeable.
-- Doug --
-- Doug --
I posted at the link below. The first shot is full tele, the second is full tele with DZ. Notice the tree on the right side. Zoom in close to see the detail on the branches.
http://www.zing.com/album/?id=4292573879
http://www.zing.com/album/?id=4292573879
Doug, Thank you for the explanation. Yes, that seems to the reason that Alika sees less CA with digital zoom.
Robin Bennett
Leading Member
I tried a non-DZ image of the moon yesterday and a DZ shot. These are the original pictures--no editing.
Of course, because of some of the moon shots I have seen on this forum, it makes me want to get a telephoto lens. Any recommendations?
Of course, because of some of the moon shots I have seen on this forum, it makes me want to get a telephoto lens. Any recommendations?
fg
Leading Member
if you resample the image in PS (not just zoom) you will see similar if not cleaner results.
angela37564
Leading Member
I am so glad you posted all this information on digital zoom. After reading how bad it is in all the reviews, I wasn't even going to try it. What a nice surprise! I love this forum, I learn something new every day. No wonder everyone is so hooked on it.
Mike K
Veteran Member
Alika, I agree with the others: to make an even reasonable comparison you need to resize the photo to compare it to digital zoom. You don't seem to understand the concept so here is a good, short description:
http://www.luminous-landscape.com/understanding_resolution.htm
Acrtually I would expect digital zoom to do quite well by comparison to resizing as another poster has explained. In some of the other forums this has also been the case. However, digital zoom is not the same thing as cropping, as that is a studied, after the fact editing feature. It is a poor person's substitute for a quality teleconverter.
I like your Moon shot very much. I am not talking about the Moon itself. I have seen Moons with a lot larger size with better clarity. But your picture capures the blue sky and good details of the tree at the left. It looks so unique. Good shot !
I would also expect that the software is doing some anti-aliasing. That would help reduce some of the purple fringing and blooming.
I had the same assumptions as you, DZ is bad news. I was suprized how good it was. Of course, it cannot match a good teleconverter. But, its a good tool to know about even if you have a teleconverter.
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