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A photographic lens is used to focus the light onto film or a digital sensor. Many cameras have interchangeable lens systems, allowing the photographer to choose the type of lens to use.

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3answers
114 views

How do I rig up a color filter for my Sigma 8-16mm Ultrawide?

I am a bit confused... I'm not sure if the cokin system will work on my lens, as my lens doesn't have threads for a filter. I've found that placing a Z series cokin filter in front of the lens will ...
3
votes
3answers
338 views

What can I do when autofocus suddenly starts blocking at around 2m on a Nikkor AF-S 28-70mm 1:2.8 D?

I had this lens for quite a few years now, it used to work as expected. I didn't use my stuff for a few months, maybe 6-8 months. I just bought a D600 and tried to use them. The AF does not work as it ...
0
votes
2answers
37 views

How to lock aperture using Reverse ring with Canon 600D?

Is there anyone using reverse ring and know how to lock the aperture. I tried doing the techniques provided on youtube. First connecting the lens on original positions then lock the aperture by ...
0
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2answers
135 views

Why can lenses only focus from so close?

I have always wondered, why is it that a lens can only focus from so far away from the subject? I know some lenses have a kind of macro switch which basically allows them to focus closer but why are ...
2
votes
1answer
125 views

Nikon 16-85 VR focus noise problem?

My 16-85 VR is doing some weird noise during focus, manual or auto. It's like an hiss. I asked in a local shop and they said it can be some microdust inside the lens. But I'm a little worried it can ...
0
votes
1answer
45 views

Sigma 24 mm f/2.8 AF Super Wide II vs Minolta AF 28mm f/2.8

I am looking to expand my arsenal with a wide angle fixed focal length lens for my Sony SLT-A77. I can get both of the above mentioned lenses for roughly the same price, however I have no indication ...
2
votes
0answers
50 views

Using lightroom lens correction profiles on DX cameras

I have a question about using the lightroom lens correction profiles for cameras other than full frame. I have been using a Tamron 24-70 which is known for having slight vignetting (full frame only) ...
2
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0answers
88 views

How can I fix a Nikon DX 18-135mm with an aperture stuck open?

I am currently on a trip and I brought an 18-135mm lens and a 35mm prime as my two lenses for the trip. When I took my zoom out of my backpack off the plane and put it on my camera, I immediately ...
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0answers
4 views

How do waterproof lenses focus underwater?

Our eyes need air in front of them to be able to focus properly, that's why when we go swimming using goggles, our surroundings are much clearer than without. So my question is, how to waterproof ...
0
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0answers
41 views

Missing Grommet on lens that secures lens cover

I have a Canon Power Shot SX500 IS with a Canon Zoom Lens 30 x IS. The grommet located in the inside lip at end of the lens fell out and was lost. It secures the lens cover when in use. Where can I ...
0
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0answers
39 views

What kind of chromatic correction has the Pentax M 50mm f/1.7

http://www.kenrockwell.com/pentax/35mm/lenses/50mm-f17-smc-m.htm After the chromatic aberrations that I observe, it could be an achromat.
0
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0answers
54 views

Bayonet mount adapter

I am planning to buy a Vivitar lens with a 58mm bayonet mount. I need to fit it to a 58mm screw fixing. Can I get a adapter to do this? If so, where and what is it called?
0
votes
0answers
32 views

How to accurately calculate size in image using relations and a reference

OK so the relation math is easy enough. If you know the size of an object, say a 12" ruler in the image, and you put the ruler flat against another object like a door. You take a picture of the door ...
0
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0answers
164 views

Will an adapter tube for a Fujifilm Finepix S4500 fit a Finepix S4830?

I have the s4830 camera and was looking into getting a lens adapter tube, but I can only find one for certain models, including the s4500. Would an adapter tube meant for the s4500 fit my camera as ...
0
votes
0answers
170 views

Where can I find a service manual for Tamron AF 28-300mm f/3.5-6.3 XR LD Aspherical Macro Zoom Lens (for Nikon)?

I'm a photographer from Sri Lanka. I disassembled my Tamron AF 28-300mm f/3.5-6.3 XR LD Aspherical Macro Zoom Lens (for Nikon) to clean it myself. But now, it's difficult for me to reassemble it. I ...