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2 votes
1 answer
641 views

How to disassemble this part of the lens?

0 votes
3 answers
293 views

Converting panoramic MF lenses to 35mm equivalents?

1 vote
1 answer
57 views

How can I clean fungus in my lens, and/or prevent fungus from spreading in the lens?

1 vote
4 answers
1k views

Why does my Nikkor AF-S DX VR 18-200mm's focus ring stop at 0.9m?

0 votes
1 answer
42 views

Mounting Canon focus by wire lens (EF 50mm f1.8 STM) to EOS 300

1 vote
3 answers
108 views

I have a Canon EOS 50D, and my lens (EFS 18-200 mm) just broke. What should I replace?

2 votes
6 answers
320 views

What size lens will give a 2ft by 2 ft view at a range of 2 ft?

2 votes
1 answer
52 views

Nikon Lens dropping focus

0 votes
0 answers
32 views

Tamaron 150-500 A011 lens auto focus issue

0 votes
1 answer
46 views

Calculating FOV for mismatched lens/sensor size

0 votes
3 answers
533 views

Why are the lights fuzzy/hazy/blowing out in my pictures?

2 votes
2 answers
98 views

Relative performance of single lens on different format sensors

1 vote
1 answer
115 views

Is this Normal?, Nikon 24mm pc-e shift knob wobble

3 votes
5 answers
247 views

Why does viewing the sun through a telescope burn your eyes?

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