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Questions tagged [lens]

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.

5
votes
2answers
870 views

Buying a lens with light haze?

I’m trying to build a full-frame DSLR kit on the cheap by buying used. When looking at old lenses on eBay (for example, the Canon 100-300 L), they are often described as having a low amount of haze. ...
1
vote
2answers
53 views

What are these streaks on lens and how to remove?

The front of the front element of a lens I have has streaks that are visible only when light is shone through them at some angles. They do not appear to be scratches. The element looks fine in normal ...
1
vote
4answers
82 views

how to tell what cameras a particular lens will fit

I have a 10x High Def. 2 element macro lens, which was purchased for an older Kodak EasyShare Z612 camera. Since it now appears that the camera may be broken beyond repair, I need to know if there is ...
2
votes
1answer
89 views

How does dust get in a lens?

I recently saw someone offering an Nikon 70-200mm VR II lens for a good price second hand. The only drawback mentioned was that it has a little dust behind the front element. How could this dust ...
6
votes
2answers
77 views

What should I consider when buying a camera and lens to take photos of surfaces for 3D textures?

I would really appreciate if you could help me find the best camera or camera's to take photos of textures. These will mainly include cabinets, countertops, tiles, backsplashes, hardwood flooring and ...
2
votes
3answers
66 views

What causes these white rings in images taken with Contax T2? Is there a fix?

What are these white rings that have been showing up on my film? How do I prevent them from showing up in images? How can I remove them from existing images?
3
votes
2answers
92 views

What are the pros and cons of using enlarger lenses for general photography?

Enlarger lenses seem to be available for very little cost. What are the pros and cons of using enlarger lenses for general photography?
4
votes
1answer
157 views

How to identify the original manufacturer of lenses branded Vivitar?

There are Vivitar-branded lenses for which I wish to identify the manufacturer. I have read that Vivitar encoded the manufacturer in the serial number, so in principle, I just need to find a list of ...
18
votes
4answers
13k views

What swirly bokeh technique is this and how can I achieve it?

What is the technique used to capture this image? How can the result be achieved? I know that it can be achieved in a digital darkroom but how can I replicate the effect straight out of the camera?
-1
votes
0answers
72 views

Noise at Low ISO

Hi I use a Canon 80D with zoom lenses Tokina 11-16 Canon kit lens- 18-135 I usually get noise on people's faces. I capture at Low ISO, even in daylight at times. I can't figure out why. Could ...
0
votes
3answers
76 views

Should I remove UV filters from lenses for product photography? [duplicate]

I am starting to do product photography but I dont know whether I should keep the uv filter on my lens or not.
0
votes
2answers
55 views

Does adding a lens with a higher MTF50 in front of a lens with a lower MTF50 increase the MTF50 of the entire system?

I know that the MTF of an entire imaging system can be modeled by multiplying the MTF of each component (possibly because multiplication in spatial frequency domain is convolution in space?) So, let'...
14
votes
4answers
2k views

When removing a lens, does Image Stabilization need to be turned off on the lens?

I am taking a photograph course and the instructor, who repairs cameras, says it is extremely important to turn off the Image Stabilization on the lens before you remove it from the camera. He says ...
1
vote
4answers
401 views

How to get lens serial number from Exif?

I want to write down model name and serial number of my camera body and camera lens, in case they are lost or stolen. Where can I find those data? Lightroom provides all data but serial name of lens. ...
2
votes
2answers
170 views

Nikon Lens makes buzzing / humming noise when VR is on - is this normal?

I was given a Nikon AF-S VR Micro-NIKKOR 105mm f/2.8G IF-ED lens as a Christmas gift. It takes great pictures, but one thing I noticed immediately is that it makes a buzzing or humming noise when ...
-1
votes
0answers
33 views

I have a canon rebel T6, are there any one on one online courses to learn everything about how to use this specific camera? [closed]

Which includes how to use external flash, diffusers, lights, reflectors, lenses and all features in this camera? Thank you!
33
votes
4answers
21k views

What is a macro lens?

I've read a few threads on here that mention some elementary descriptions of macro lenses and found some marketing fluff in the box for my Canon about them as well, but being a complete novice I was ...
1
vote
5answers
84 views

Why Nikon announced S-Line lenses with narrow apertures first?

Some time ago I saw the Nikon's roadmap for new S-Line lenses and today I found an update to this roadmap. I am wondering why Nikon is building lenses with those apertures first, is it a market ...
0
votes
0answers
32 views

What size filter or petal hood for Canon Rebel T6? [duplicate]

I know it sounds like a vacuous question. However, I have not been able to find info on this topic. Sizing of filter and lenses. I bought some filters for my camera and they didn’t fit. Camera sets ...
0
votes
2answers
91 views

What lense and flash should I get to take pictures of kids?

I'm new to having a camera and I'm not sure how everything works with my DSLR. I have a T6, and I would like to take pictures with flash without the kids squinting and that it is fast when I shoot. I ...
0
votes
2answers
145 views

What would a 10-300 f/1.4 lens (such as for a spacecraft) look like?

My basic question is, what would a fast lens with a huge zoom range look like? This question has been asked and answered for photographers on the ground - the answer was basically (rightfully) "no ...
31
votes
11answers
2k views

Will a tilt-shift lens solve my 'leaning building' shots?

I shoot primarily with a Nikon D300, and that's not likely to change soon. The camera does everything I need it to do, but this. I also use a 17–55 mm lens, which I know that Thom castigates as ...
0
votes
3answers
72 views

Thoughts on using Sigma 18-250mm F3.5-6.3 DC MACRO OS HSM for Macro photography

Is the Sigma 18-250mm F3.5-6.3 DC MACRO OS HSM a good lens to be used for Macro photography? I mostly try to photograph flowers and also insects sometimes. I will be using it with a Canon EOS 800D and ...
0
votes
2answers
111 views

Which Nikon mount adapter to get for micro four thirds?

I just bought a MFT Panasonic Lumix GH3, and I have no lens for it. I found that I can put an adapter in order to use my Nikon lens. On the adapter it says: Nikon(G) to micro for thirds. I'm a little ...
2
votes
2answers
101 views

Will a faster lens help getting a better (faster/more accurate) focus? [duplicate]

I read that with some cameras (but which?), using an f/2.8 lens or faster enables a more sensitive phase AF point, so there is quantum jump in AF accuracy. But that's not really my question :) My ...
2
votes
3answers
143 views

What are the technical reasons to design lenses with oddly shaped apertures?

Some lenses have oddly shaped apertures, like star or shuriken shaped. It seems to be intentional since making "normal" rounded or polygonal apertures is fairly simple (as I have observed while ...
3
votes
4answers
230 views

Which lens should I purchase?

New to photography and have found myself wrapped up in it, what an exciting and fun art form! I have a Canon Rebel T6 (1300D) that came with the standard kit lens as well as a 75-300 lens that came as ...
9
votes
3answers
1k views

What is the technical name for a zoom lens which has a fixed maximum aperture?

What is the technical name for a lens which has the same maximum aperture throughout the entire zoom range?
2
votes
1answer
605 views

Why don't all zoom lenses have variable f-numbers? [duplicate]

As I understand it, the f-number is a ratio between the focal length and the aperture diameter. A zoom lens can change focal length, but shouldn't the maximum aperture be a fixed size? If so, that ...
0
votes
1answer
77 views

How is a lens's listed minimum focus distance affected by zoom?

I have a 55-210 zoom lens, and the specs show that the minimum focus distance is 1m. Does that distance remain constant if I use the zoom? Or does that change it? Thanks in advance!
1
vote
5answers
310 views

What wide-angle lens for MFT?

I bought a Panasonic Lumix GX1 with the idea of using it for indoor wide angle shots for real estate. Obviously, I didn't realize what I was getting into. My little point and shoot Lumix takes wider ...
2
votes
1answer
96 views

What are the differences between projector, enlarger, and macro lenses for photographing 35mm slides?

I have some 35mm slides that I would like to digitalize. I am thinking about building something like this (modifying a slide projector to feed the slides and mounting a dslr to photograph the slide ...
1
vote
2answers
101 views

How to avoid perspective distortion when taking selfies?

I'm looking for an affordable way to avoid perspective distortion when taking selfies. I know the best way to avoid this would be taking a portrait with a DSLR with a 200mm-ish lens from 8 ft away, ...
3
votes
1answer
284 views

Can anyone help identifying this (close-up or what) lens?

T-mount on one side and something strange (similar to Arri PL? on the other)?
1
vote
2answers
1k views

70-300 AF-S Lens Won't Autofocus on one of my D7100's

I recently purchased a used Nikkor 70-300 AF-S VR lens used from B&H that is in "Excellent" condition. I have 2 Nikon D7100 bodies that I shoot with and both autofocus just fine with all of my ...
2
votes
2answers
88 views

What would happen if a lens had translucent aperture blades?

Apodization filters seem to be used to improve bokeh. They also seem to be able to improve sharpness and increase depth of field. But they also reduce light transmission. While thinking about how an ...
15
votes
4answers
3k views

What is the difference between perspective distortion and barrel or pincushion distortion?

I've heard of: perspective distortion barrel distortion pincushion distortion mustache distortion What are these different types of distortion, and how do they relate? What causes them, and can they ...
1
vote
2answers
88 views

How to tighten loose focusing ring on Canon lens?

I'm not sure if it's my particular copy of the lens, but I find the focusing ring of the Canon 24mm TS-E Mark II a bit too loose. It's too easy, in other words, to change the focus by mistake. I ...
2
votes
3answers
123 views

Can lens defects, such as scratches or fungus, improve image quality?

There are cases where significant damage to lenses, such as major front-element scratches, have been shown to imperceptibly affect image quality. This has led me to wonder: Are there any known cases ...
0
votes
4answers
100 views

What is the relationship between lens diameter and exposure?

All of the online calculators for exposure, I have seen, factor in time, film speed, and aperture (which is a function of the iris diameter and the focal length of the lens). However I would have ...
40
votes
13answers
127k views

Why does fungus form in lenses, and how to get rid of it?

Recently I was using an old Pentax 50mm f/2 that had a quite big green spot, and later I was informed that it was a fungus. A couple of questions raised from this: Why does fungus form inside the ...
1
vote
0answers
23 views

Aperture control flex ribbon replacement in Canon EF-S 55-250mm f/4-5.6 IS II [duplicate]

Building upon this great answer to: Canon EF-S 55-250mm f/4-5.6 IS II causes Err 01 only when zoomed beyond 135mm I'm pretty sure that the ribbon controlling aperture inside my Canon EF-S 55-250mm ...
0
votes
1answer
79 views

Lens recommendation for tiger photography

I am planning to take a photography tour in India to photograph tiger and other animals. What lens would be recommended for such purpose? I am canon user and have 5d mk iv with 100-400 IS I. I have ...
9
votes
2answers
498 views

What does “AUTO-ZOOM” mean on my Zuiko lens?

"Auto-zoom" is written on my Zuiko 35~70mm lens, is this a name of some lens technology?
2
votes
1answer
67 views

How to identify the original manufacturer of lenses branded Sears?

There are Sears-branded lenses for which I wish to identify the manufacturer. I have read that Sears encoded the manufacturer in the serial number, so in principle, I just need to find a list of ...
2
votes
1answer
168 views

Zoom or Prime Lens(es) for Wildlife Photography on Limited Budget (Nikon D500)

I am currently looking into purchasing some new lenses to accompany my shiny new Nikon D500 on a safari trip in a month. In the past, I have used a Sigma 150-500mm (purchased in 2009 - see here) with ...
14
votes
3answers
750 views

Is it worth upgrading one stop for wildlife photography?

I have just purchased the following lens to accompany my Nikon D500: AF-S NIKKOR 70-200mm f/4G ED VR - £1,349 (see here) However, having purchased this lens a few hours ago, it has been pointed out ...
1
vote
1answer
56 views

How much silica gel should I put in my dry box?

How much grams of silica gel should I put for my 4.6L air tight dry box? I have a silica gel inside of a plastic sachet but I cut the plastic and put it in a small open container to absorb moisture ...
-1
votes
0answers
30 views

AF not working, need help

so a few days ago i dropped my 18-135 cannon lens (yup, bed). I was pretty sure the lens need repair, because it wouldn't AF. MF is working. However I tried using the lens on an another camera and it ...
6
votes
3answers
9k views

Do all Canon DSLRs have in-body AF motors?

Do all Canon DSLRs have autofocus motors? I've searched a lot but found mixed answers. Some sites say that no EOS body has a focus motor (and that all EF lenses have AF motors), but some say all EOS ...