750d focus issue?

Seems to me to be reasonably focused on the intended spot. I think the issue with this pic is diffraction from the small f/16 aperture.

The 1.333x greater mp of the 750D over the 700D means 1.15x greater image magnification when viewing at 100%, and diffraction is going to be more apparent. Diffraction due to small aperture is not usually noticable at normal viewing size/distance.

Other possibilities - Assuming the EF-S 18-55 f/3.5-5.6 IS STM used is new and you used a different lens with the 700D, there may be some performance variation in the lenses. If you're using a "protective filter", try shooting without it.

IMHO, YMMV

--
Unapologetic Canon Apologist

In addition to reducing diffraction a larger aperture would also allow faster shutter speeds and reduce the chance of camera shake (at 1/30 second) - its worth trying a few photos of the same subject with different speeds and apertures to see the difference.

If you have access to a different lens (especially a prime within the range of your zoom) it would be helpful to compare the same subjects and aperture/speed combinations.

Looks to be in focus but with a soft lens. The newer sensor is more demanding and f/16 is definitely too small an aperture.

Thanks to you all for responding. I think I've had it too easy with the 700D as I didn't need to think much about what I was doing and got enough of a result that I was happy most of the time. Funny enough I was wondering about the aperture so I did also shoot one at F8 at the same time, focus point roughly the same third in the middle. (I must have misplaced the white rock this time!!) I'd appreciate opinions if you think this is any sharper. I used the 10-18mm for this one with a shutter of 1/160 mounted on a tripod. I'm going on hols in September and I'm scared I'm going to come home with a load of rubbish. I also most confess I'm not one for photoshop.

Many thanks

Kerri

Hurricane1972 said:

Thanks to you all for responding. I think I've had it too easy with the 700D as I didn't need to think much about what I was doing and got enough of a result that I was happy most of the time. Funny enough I was wondering about the aperture so I did also shoot one at F8 at the same time, focus point roughly the same third in the middle. (I must have misplaced the white rock this time!!) I'd appreciate opinions if you think this is any sharper. I used the 10-18mm for this one with a shutter of 1/160 mounted on a tripod. I'm going on hols in September and I'm scared I'm going to come home with a load of rubbish. I also most confess I'm not one for photoshop.

Many thanks

Kerri

Click to expand...

On this one your focus point was in the middle of the flat sand in the foreground - closer to you than on the other shot - not much of interest in that area - but the small stones in the middle and close to the bottom of the picture look pretty sharp to me.

hi.

have you tried taking sample pictures with live view? i think you have huge front or back focus due to auto focus system problem!

did you hear double beep when you half press shutter which it mean you have correct focus?

just take some picture with just live view and then send a sample here.

i have Nikon D5500 with excellent 24 mega pixel sensor just like Canon EOS 750D.

so, many pixels will show lens or auto focus problems very better!

my D5500 had this problem with 18-140 kit lens. and after checking my camera i understood i have front focus problem. i just solved this problem myself and not Nikon serves! (learned how to fine tune my camera just in Dpreview forum!) D5500 have two screw for adjusting AF sensor (phase detection) mechanically! and actually it worked great.

anyway, you must check live view photos and compare images with those images which took with phase detection AF.

remember! take test picture with widest aperture like f/3.5 in kit lens to find out the problem better!

greeting

Hurricane1972 said:

I'm going on hols in September and I'm scared I'm going to come home with a load of rubbish. I also most confess I'm not one for photoshop.

Many thanks

Kerri

Click to expand...

Hi Kerri,

A lot of really good advice has been offered up so far.

For landscapes, stay way from the small apertures to avoid diffraction (more noticeable when viewing images from these higher resolution sensors at 100%). Don't go past f/8 - f/11.

Check your in-camera sharpening/contrast settings.

Avoid camera shake by using higher shutter speeds (may need to bump the ISO up).

Or use a tripod, but then I'd highly recommend turning the Image Stabilization off, and using the 10-second self-timer (never the 2-second), or better yet use a remote release.

In low light, give Handheld Night Scene mode a try, or Multi-Shot Noise Reduction. They both were designed specifically for low light handheld shooting, and IME are very effective.

Remove any "protective filter" if you're using one. Use a hood religiously.

Test other lenses for focus accuracy (ie Front or Back focus). It's possible that body or lens(es) may be miscalibrated. It's also possible that your copy of the body may be bad.

Perhaps use Live View for landscapes. The flippy screen and WYSIWYG can be very useful. Touch focus is quick to adjust and is very accurate.

If you're using AI Servo AF, then don't recompose unless you've locked focus.

Switch to a single AF point for all of your focusing. Multi-AF can often produce unpredictable results. Tell the camera what You want to focus on. This is key to getting the most predictable and consistent results. I can't stress this enough.

Note: Your first example is in-focus, but you likely ran up against diffraction, lens softness, and camera shake.

Your second example is waaaay front-focused. Do some testing using a single AF point, and then re-evaluate for focus accuracy and lens softness, all the while using good technique to eliminate any other factors.

Don't get discouraged. Many many other folks have shot with the same body and the same lenses that you have, and have gotten superb results. There is a fix, and we'll definitely get to the bottom of the issue(s). Before you head out on vacation.

Holler back with an update.

Good luck,

R2

Hi,

I've recently upgraded from a Canon 100d to the 750d and was disappointed with the results in image quality. Their seems to a lack of sharpness and detail that was present with results from the 100d. I'm fairly new to photography the 100d was my first dslr and when I saw the results it was capable of producing I was pretty much blown away.

When I got the 750d I was expecting more of the same but better as you would from an upgrade, instead I was quite disappointed and regretted selling my 100d. When I used the 100d I would often shoot in Auto programme mode purely because I was new to dslrs and as I gained a little more experience I would experiment with Av and Tv and found I could get fairly good results. Overall the 100d seemed very consistent and reliable and I took the results for granted.

Now I'm using the 750d I'm finding my shot success rate (acceptable shots) has fallen dramatically and have the notion that there may be something wrong with it. As I said I'm fairly new to this and have been reading up and trying to figure out what the problem could be. I know that the two cameras are different beasts having different Af types and sensor mp sizes and that the 750d may require a little more effort.

I'm now wondering if its Me or the Camera at fault, should I persevere and work on my technique or am I overcompensating for a sophisticated tool that has calibration issues and possibly faulty. Is there any way, a simple test that can resolve this.

I'm currently using Canon ef-s: 10-18mm is stm; 18-135mm is stm; 55-250mm is stm and 60mm usm macro which all seemed to work very well with the 100D notably the 18-135mm and 55-250mm produced very sharp images.

Any comment or suggestions would be most appreciated.

If you are using the wifi transfer app, make sure it is set for maximum resolution. The default is low resolution. Have you tried transferring with a card reader? Are you checking your pictures on a computer screen or on a tablet or phone?

The camera has "Picture Style" settings in the menu. You can set things like sharpness, saturation, and contrast in that menu option. Try a higher sharpness setting ... try 7 just to see what it does ... and see if that helps.

Camera shake is a very common cause of soft pictures, and is really exposed by these high resolution sensors. Try different shutter speeds and aperture settings. On indoor shots, try using the flash and see if that sharpens things up.

last, you might also want to try another lens and see if that gives better results.

Soft IQ was one of my biggest complaints with my T6S when I first got it. After figuring things out, that is not even the slightest concern now.

I have tried changing the picture quality settings and did change up sharpness to 7 and set to Neutral. I've also been shooting in Tv mode with higher shutter speeds and sports mode for fast moving objects; I hear the latter is a weak point in the 750d. What confuses me is when set to auto (P on the dial) it seems to make poor decisions like setting the iso to 6400 and very low shutter speed and the results are poor. So having tried a faster shutter speed, not using high f numbers (defraction problems), increasing the sharpness and shooting in good light I'm still seeing average and below average results. Because I'm new to photography and not that skilled in technique and composition I tend to fixate on accurate focus, images sharpness and detail. I can work on my technique and composition and learn about all the features and setting on the 750D but if there is a problem with camera then none of that will make any difference. For that reason I'm trying to eliminate that possibility by reading blogs, forums and reviews about it to identify common problems and faults. I was wondering if there are tools, standard tests I could put the camera through so I could se clearly if it passed or failed. I've read that there is a possible focus issue with the 700d, 750d and 760d and that these cameras lack adjustment features to correct front or back focus problems.

The lenses I'm using all have image stabilization and should help with camera shake a little, Canon suggest that they give up to 3 stops advantage. When used with the 100d which is as light as a feather seemed to work very well giving very good sharp results.

Thanks for you comments, they are all very helpful and appreciated.

There are some things you can try to see if you can improve the focus. First, select One Point and then a single focus point rather than multi-point focus. You will then have control over where your camera focuses. You can also try using Live View, which should provide a very accurate AF. You can also try manual focus and see if that improves things.

These can help if there is a focus issue, and it might let you know if there is a back or front focus issue with the lens you're using.

Canon will recommend you do a complete reset of the camera, including custom settings, before reaching any conclusions.

Just curious, but are you getting the same soft focus problems when shooting indoors with the flash?

James0065 said:

Hi,

I've recently upgraded from a Canon 100d to the 750d and was disappointed with the results in image quality. Their seems to a lack of sharpness and detail that was present with results from the 100d. I'm fairly new to photography the 100d was my first dslr and when I saw the results it was capable of producing I was pretty much blown away.

When I got the 750d I was expecting more of the same but better as you would from an upgrade, instead I was quite disappointed and regretted selling my 100d. When I used the 100d I would often shoot in Auto programme mode purely because I was new to dslrs and as I gained a little more experience I would experiment with Av and Tv and found I could get fairly good results. Overall the 100d seemed very consistent and reliable and I took the results for granted.

Now I'm using the 750d I'm finding my shot success rate (acceptable shots) has fallen dramatically and have the notion that there may be something wrong with it. As I said I'm fairly new to this and have been reading up and trying to figure out what the problem could be. I know that the two cameras are different beasts having different Af types and sensor mp sizes and that the 750d may require a little more effort.

I'm now wondering if its Me or the Camera at fault, should I persevere and work on my technique or am I overcompensating for a sophisticated tool that has calibration issues and possibly faulty. Is there any way, a simple test that can resolve this.

I'm currently using Canon ef-s: 10-18mm is stm; 18-135mm is stm; 55-250mm is stm and 60mm usm macro which all seemed to work very well with the 100D notably the 18-135mm and 55-250mm produced very sharp images.

Any comment or suggestions would be most appreciated.

Click to expand...

If you post some examples - full size jpg - straight out of the camera with EXIF intact we might be able to help. Try posting a couple with the different lenses in good light that you don't think are adequate but that the 100d would have got right.

I'm not sure how to upload images here as only used this site since yesterday and haven't navigated the interface yet. I do have a flickr account that has all the exif info and 99% of my images are unprocessed straight out of the camera LJpeg or raw. So you can find them under my user name James Richer and I can be identified by my join date Feb 2017; Richer is a fairly uncommon surname so there will only be a handful there. The pictures aren't that good and I know I've made multiple mistakes but that applies to the 100d as well as the 750d, it just seems the 100d is more forgiving.

Thanks for comments and suggestions all very much appreciated.

Having got used to the 100d I learned quickly about focus points and shot mainly in single point focus and not auto select as it gives less control over what gets final focus.

I do use flash indoors but not so keen and didn't need to as much with the 100d and of course using flash means quicker shutter speeds and sharper pictures but that doesn't resolve daylight shooting.

Another annoying thing I have just discovered is that macro mode doesn't have single af point focus and uses multi af points that it chooses so you end up wrestling with camera over where it focuses and unless the object is static makes it very difficult. When you consult the manual about this it just isn't mentioned. Of course I can set to manual which is recommended for macro but sometimes you need both options.

The only real improvements I can see in this camera are build quality and being able to blow image magnification by 100% but I doubt that ill ever print giant poster size prints and prefer smaller sharp pictures to large blurry soft focus ones.

I'm seriously thinking about selling it on and going back to the 100d, when I read reviews of the 100d they are usually very positive unfortunately this isn't true for the 750d.

Using most features on the 100d my reaction was wow that's amazing, with the 750d its been predominantly oh that's disappointing.

Click on the icon on the top right of the message box ... with what looks like two mountain peaks ... and choose how you want to insert a photo. Just repeat the process for multiple images.

Ok I'll try that tomorrow, thanks for the info.

James0065 said:

So you can find them under my user name James Richer and I can be identified by my join date Feb 2017; Richer is a fairly uncommon surname so there will only be a handful there. The pictures aren't that good and I know I've made multiple mistakes but that applies to the 100d as well as the 750d, it just seems the 100d is more forgiving.

Click to expand...

Could you point to photos shot under similar conditions where you think the 100D did a better job?

The most recent low light photos around the country house shot with the 750D are not terribly impressive but they were all shot at 3200 ISO - I can't think that they would have been any better with the 100D.

I did find one low ISO example shot with the 750D - the swan (IMG_8857) - this looks pretty good to me.

That's the thing because there are so many variables different light conditions due to time of year and position of sun or absence of cloud, it makes it difficult to find like for like picture. On switching form the 100d to the 750d my first impression was that it wasn't finding exact focus and the pictures lacked sharp detail in the area of focus. Because I had been looking at the results of the 100d for that last year this lack of focus sharpness seemed to leap out at me. I know the swan is acceptably in focus but if you compare it to other pics of swans taken on the 100d they are all sharp and in focus with plenty of detail and contrast, the one taken with the 750d is a little flat and I was standing about 2-5ft away when it took it. I often take a test shot if I buy a new lens and use the bird feeder in my garden, when I got the 55-250mm is stm for the 100d I managed to to get some fairly decent shots of Coldtits stand form about 40ft and zoomed to 255mm in varying light conditions. The same was true of 18-135mm is stm. Since getting the 750d I haven't been able to get one decent shot and we have has a few days where the light was very good. I don't think I have those shots but ill have a look for them and see if I can find some other shots for comparison. I'm starting to think that I may have a front focus problem. I places a tape rule along the floor and placed a piece of paper underneath a positioned 3 identical keys along its scale (cm) the length of the tape was 300cm and I placed my focal point on the 20cm mark where I placed my central key just opposite and the two others just above and below at equal distances. I took the picture and The key in front of the key on my focal point was in sharper focus. Focus fell of behind 20cm quite dramatically with increasing blur from at 19cm which was very out of focus. in front of my focus going from 21cm to 30cm were in sharp focus being sharper around 23cm 24cm. I don't know if I'm being stupid because I got this idea for a test off of a blog about front and back focus issues and perhaps given the aperture and angle of shot these results are normal. I will upload that shot and you can tell me what you think.




test focus for canon 750d.

Hi,

I managed to find similar shots taken in Late feb early march 2016 and late Feb 2017.

They aren't great shots, what can I say I live by the river. The shots of the bird in the tree was taken from my lounge window and what struck me was the detail in the lichen and not the bird. Compare it to the blossom buds from the same window using 750d where I used a central focus point, you can see other parts of the image in sharper focus. The wildfowl pics to me seem to show a more accurate focus and sharper fine detail.

I have just added the pics to my flickr account so they will the last fourteen pics added, I tried to upload them here but each file was taking 5mins for some reason so its easier to add them to flickr. Let me know what you think and thanks for all the help.