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20 questions linked to/from How can I test a new lens to make sure it is operating correctly?
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57 votes
5 answers
24k views

What methods can be used to micro-adjust autofocus of a camera body to a particular lens?

I have a Canon 7D with a 50mm f/1.4 lens, and I think the auto-focus of the lens is off. How can I test and adjust this reliably? Will this approach work with all of my lenses? If I had a different ...
EtienneT's user avatar
EtienneT
  • 2,013
12 votes
2 answers
5k views

How can I/should I check the sharpness of my camera lens?

The sharpness of a lens is a major concern for most photographers. This might be because we are worried about a defect in the lens, a problem with our technique or a problem with the camera. Or we ...
labnut's user avatar
labnut
  • 8,287
11 votes
2 answers
3k views

How can I determine if my Sigma 10-20mm lens copy is appropriately sharp and focusing right?

I just purchased a Sigma 10-20mm lens (Canon mount) and based on the reviews I was aware that many people receive copies of the lens that are soft or don't focus properly. I purchased from B&H, so ...
Adam Franco's user avatar
Adam Franco
  • 765
10 votes
3 answers
2k views

Is my Canon EF-S 15-85mm IS USM lens defective or par for course?

I got the Canon EF-S 15-85mm IS USM this week after a lot of deliberation as an upgrade to my 18-55mm IS kit lens for my Canon 550D, and did some trial shots using it and found the images to be on the ...
ab.aditya's user avatar
ab.aditya
  • 4,645
10 votes
3 answers
450 views

What are the standard tests available to quantify lens parameters?

In some of the questions I have asked here, some of the terms frequently used to describe the difference in image quality between the cheaper lenses and the premium ones have been increased contrast, ...
ab.aditya's user avatar
ab.aditya
  • 4,645
7 votes
4 answers
2k views

How to take sharper photos [duplicate]

I am sick and tired of getting photos that turn out just slightly blurry. I can't seem to figure out why this is or how to fix it. I like to shoot at events, indoors and outdoors, action shots and ...
Ryan's user avatar
Ryan
  • 1,135
7 votes
4 answers
3k views

How can I check for damage to my lens from impact with a window?

I was taking a photo at an airport when I accidentally zoomed my Canon SX40HS into a window. The impact wasn't super hard, but there was a thump. I cannot see any visible damage, but how can I check ...
user19750's user avatar
user19750
  • 71
7 votes
2 answers
605 views

What to look for when testing a wide angle lens before buying?

I'm looking at buying a used wide angle lens (specifically Canon EF-S 10-22mm f/3.5-4.5 ) for a crop camera. The question What should one look for when buying a used lens? covers the basics when ...
Håkon K. Olafsen's user avatar
Håkon K. Olafsen
  • 3,196
6 votes
4 answers
49k views

How can I easily tell if a sensor or lens is damaged?

I am pretty interested in recognizing any damage to digital camera in very low level (without any advanced tests). For example, how can I identify the damage of a sensor or lens? If there are any ...
com's user avatar
com
  • 163
5 votes
5 answers
39k views

Missing focus with Canon 50mm 1.8 lens - is it the lens or me?

I purchased a Canon EOS 650D and EF 50mm f/1.8 II lens. Unfortunately, the auto-focus seems to miss focus at f/1.8. I've tried setting it to single-point auto-focus: it is better, but still not good ...
Alex's user avatar
Alex
  • 505
5 votes
2 answers
2k views

Is this the level of sharpness and detail I can expect from a Nikon D7000 and 18-105mm lens?

Being a newbie, I would like to have some comments on my current skill level and quality of my current equipment. I own a Nikon D7000 with 18-105. I am not very much satisfied with the quality of ...
V.B's user avatar
V.B
  • 1,786
4 votes
1 answer
2k views

Is the Quality Inconsistent on the Canon 24-70mm f/2.8 L MkI lens?

I'm considering buying a Canon 24-70 L Mk I. There is one thing that scares me a bit, though: reading reviews around the intertubes it appears that a fair number of people had to send their copy back ...
s.m.'s user avatar
s.m.
  • 163
3 votes
2 answers
4k views

How to determine if a new lens is a subpar copy?

I have read some posts like the ones below about testing a lens to determine how well it performs optically. What I didn't see was anything on determining whether the lens performs as it should and is ...
Jim's user avatar
Jim
  • 1,207
2 votes
2 answers
463 views

Which should I buy as a starting prime lens, Canon 35mm f2 or Canon 50mm f1.4?

I am pretty new to photography. I have an APS-C camera, Canon 77D with a EF-S 18-135mm kit lens. I want a prime lens for shooting nice bokeh portraits along with street and day to day life photography ...
KALHIM's user avatar
KALHIM
  • 33
2 votes
0 answers
127 views

How to test used/second-hand lens? [duplicate]

Possible Duplicate: What should one look for when buying a used lens? I am going to buy second hand AF-S DX NIKKOR 18-200mm f/3.5-5.6G ED VR II. The price ...
Pablo's user avatar
Pablo
  • 876

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