10-09-2014 06:29 PM - edited 10-09-2014 06:31 PM
My camera is a Canon Rebel XS (dSLR) and I primarily use the 50mm f/1.8 lens.
I shoot in Manual Mode with Autofocus ON.
I am having difficulty with my photos coming out incositant - some are out of focus, while others in the same series (taken a moment apart) are tack sharp.
I've attached two examples - one of the out-of-focus image, the other sharp images (both have been blown up).
It is not camera shake and my settings are identical for both photos. (ISO 200 | f/4.5 | 1/100sec in this instance.)
This has become such a problem that I find myself needing to take 10x more photos of the same subject/pose in order to hopefully get one sharp image from the series.
I have asked multiple people about this problem (though I have yet to take my camera and lens to a shop due to lack of funds) and no one has any idea of either what I'm talking about or what the problem could be.
I would appreciate your thoughts and help!
Fuzzy/Out of Focus:
10-09-2014 07:33 PM - edited 10-09-2014 07:39 PM
50 1.8 lens auto focus is not that consistence. So miss-focus is expected. No lens is perfect but good lens perform better than cheap lens. That kind of performance is expected on a $100 lens. If it happens a lot, there maybe something wrong with your lens. You can send it to Canon but I don't think it worths it.
10-09-2014 10:23 PM
10-10-2014 11:50 AM
It's possible you got a lemon. But I never had that kind of inconsistency with my 50mm 1.8, unless I was really pushing it with the shutter speed (I'd shoot as slow as 1/20 with it). But at 1/100 you shouldn't have problems unless your hand is really unsteady. Do you have other lenses? Do you experience the same?
10-10-2014 01:05 PM - edited 10-10-2014 01:07 PM
10-10-2014 03:37 PM
10-10-2014 03:59 PM - edited 10-10-2014 04:10 PM
@Skirball- Thank you for commenting!
I do have my kit lens - 18 - 55mm - but I rarely use it so I am not sure if it gives me the same results. I will have to test it out.
@ScottyP - Thank you! I always shoot manual - for the last year I've been using the ExpoDisc which I love because it gets my exposure and white balance at least 95% correct (often more).
This particular shot is actually of 5 subjects - but it is zoomed in at 100% in Lightroom to show more detail.
I always select a single AF point - usually the center crossfocus point. I do use the "focus lock and recompose" method at times - though whenever possible I will move around my focus point in order to avoid needing to recompose.
For this particular shot, I center-focused on the man in the right of the image you see - he was dead center in the group of 5.
I am always in 'ONE SHOT' AF mode and in 'Single Shooting' Drive mode, if that helps.
Yes, I have noticed it is near impossible for me to acheive a sharp image when in f/1.8 - I typically stay at f2.2 or higher, depending on the number of subjects and their distance from me.
@TCampbell- Thank you also for taking the time to consider my problem and examine the images I provided!
While I will not eliminate the possiblity that it camera shake may be contributing to the problem (or at least to this particular image), I do tend to doubt it as my hand is usually steady; I take precautions to steady my whole body; and I have this problem even with images taken at faster shutter speeds.
This particular image was shot at ISO 200 | f/4.5 | 1/100sec.
Since this is not an isolated problem, but rather one that happens to me literally every shoot I do, I will definately have to do the test you recommended with my kit lens and 50mm.
Thank you all so much for taking the time to reply and offer your suggestions and help. I appreciate it very much!
10-10-2014 04:13 PM
If it helps, below I've included another example from the same session.
This image was taken of one subject and I focused on one of his eyes (I don't remember which one). This is also zoomed to 100% in Lightroom.
The settings are ISO 200 | f/3.5 | 1/100
10-10-2014 08:55 PM