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.

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2answers
131 views

Can Pentax and Canon mounts on Tamron lenses be swapped?

I have two Tamron lenses. Lens A has a mount ring for Canon, and Lens B has a mount ring for Pentax. Lens A is broken. Can I swap the mount rings and use lens B for my Canon camera?
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1answer
65 views

What exactly are tilt shift lenses and why are they so important [duplicate]

So I have heard things called tilt shift lenses which makes the buildings appear fully flat. I also heard its mission critical for anyone that wants to take architecture photographs. Why spend a ...
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55 views

What's the actual physics behind the optical apodization? [duplicate]

Canon seems to plan to introduce a 50mm with apodization for a more natural bokeh [1], but it is not the first in photography [2]. Wikipedia article is only an introduction [2], and does not develop ...
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50 views

What creates a calisson-like shaped light bokeh ? How to craft this aspect of the bokeh? [duplicate]

What creates a calisson-like shaped light bokeh such as this one (made with Arri signature T/1.9) ? The further from the center the more present are the angles, why ? Another lens (Zeiss Supreme T/1....
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2answers
138 views

Is it theoretically possible to use a mirrorless lens for a smartphone camera?

A example situation. I want to take photo of a far away text for identification but my camera has a dead battery! If I decide to use my phone (Just another 1/2.55 smartphone) and a RF (Or a EF-S) ...
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2answers
121 views

Do I continue to use Micro Four Thirds or go DSLR for sports photography?

I currently have a Nikon D5500 with the kit 55-200mm f4-5.6 lens (what I have been currently using) and a Lumix g85 (with a lens too small for sports photography). My girlfriend races motorbikes and ...
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1answer
131 views

Do DSLR and Mirrorless cameras need respective lenses, or can they use the same lenses?

Simple question really. The flange distance of DSLR cameras are huge compared to the mirrorless cameras. So. Can you use share lenses between the rivals and manage to take photos? The only problem ...
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1answer
40 views

Can Nikon Nikorr 50/1.4D be used with a Nikon FM2?

I plan to obtain Nikon Nikorr 50/1.4D. Can it be used for Nikon FM2? Is it an AiS lens? I read somewhere that non AiS Lens may damage FM2.
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135 views

Will a Canon 200D's STM lens make the same sound on a Canon 3000D/1500D?

What I understand is that STM is a part of lens, not camera. Canon 3000D or 1500D makes noise while focusing. So if we buy a Canon EF-S STM lens, which is used on 200D, will it be compatible and ...
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3answers
169 views

Are these rear element lens scratches and do they matter?

I got a used Nikon AF-S Micro NIKKOR 60mm 1:2.8 G ED lens, but notice these scratches on the rear element: Am I correct that the white marks are scratches and will these matter or will blur of ...
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1answer
81 views

Canon ftb shutter sticking and not returning, but returns when I loosen the lens

I have an old film Canon ftb. It was working fine but suddenly after taking a picture, the shutter fails to "spring back" and the viewfinder remains black. For a while I could give the camera a little ...
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2answers
36 views

Focus motor problem in lens due to fine dust particles

I have a Sigma 18-250mm F3.5-6.3 DC Macro OS lens that I use exclusively with my Nikon D5300. I went to Denmark last year, and visited Rubjerg Knude Lighthouse. If you've ever been there, you know ...
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1answer
145 views

What makes RF lenses better than Canon's EF lenses?

So Canon finally got into the mirrorless league — but they also made a new lens mount for their mirrorless cameras! Is there anything better in RF lens mount or lenses that makes them better than ...
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1answer
47 views

EF lens on an EF-S body [duplicate]

I have an EOS Rebel T7i and am wondering if I can put an EF 75mm-300mm lens on it. Thanks and have a great day!
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2answers
48 views

Ultrawide Lens for Nikon D810 and D3300

I know my question is a bit general but I am super confused as the range of available lenses is amazingly wide. I am looking for an ultrawide lens for my gears (D810 and D3300) to do: 1. Landscape ...
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5answers
241 views

What should I look for in a lens in order to make my product photography more sharp?

What would be the most appropriate lens to use with a Canon Rebel T3i for taking product images of pottery vases and plates about 8" to 20" high? Images of single products are for web use, while group ...
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55 views

Effect of increasing sensor size or focal length on resolution of target object

Suppose I have a camera of sensor size 8mmx8mm, optical class (2/3)" with a compatible lens of also (2/3)". The focal length of my lens is fixed (say 8mm), and the distance to my target object is also ...
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2answers
54 views

Why does Canon have Two Kinds of Nanotech Lens Coatings?

Nikon has a single Nano Crystal Coating, while Canon has not only an equivalent coating (Sub Wavelength Coating), but they also have an Air Sphere coating which seems to do much the same thing. Why ...
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1answer
107 views

How do I find a cheap prime wide lens (28mm) to use reversed on a Canon DSLR?

I'm interested in experimenting with the reverse lens to shoot macro but as this is all an experiment, I don't want to spend that much money on it. I've been watching a Youtube video and they said you ...
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1answer
106 views

Can I reattatch the parts of my Canon 50mm f/1.8 lens which broke in a fall, without further disassembly?

The upper part of my Canon EF 50mm f/1.8 II Lens is separated from the lens body due to a fall. One of its 4 lugs has broken off. Can I still attach the upper and the lower parts without ...
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1answer
131 views

What does “II” mean on micro four thirds lenses?

I've seen micro four thirds lenses listed with the term 'II'. See the below sample listings. What is this term called and why it is used? Panasonic Lumix G 20mm f/1.7 II ASPH. Lens Olympus M.Zuiko ...
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1answer
55 views

Clicking sound and flickering display when using Sony 70-200 F4

I recently purchased a Sony 70-200 F4 and have been testing it on my A7 (the very first one). I noticed that there's a clicking sound and the display (both in the LCD and EVF) flickers whenever I ...
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1answer
101 views

Can any MFT lenses be turned into a practical object-space telecentric macro lens by reversing?

The micro four thirds specifications originally want lenses to be image space telecentric if possible. It seems that some MFT lenses actually follow that recommendation. Can reversing such a lens ...
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3answers
143 views

How commonly do constant-aperture manual zooms actually influence the aperture mechanically when zooming?

I have seen a few examples of constant aperture zooms (eg a 28-100mm f/4 Ricoh.) in the secondhand markets where the aperture appears to be not fully open (visibly non-round hole) at some zoom ...
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2answers
178 views

Can I use a 35mm film lenses on Micro 4/3 at the same focal length?

I've been shooting 35mm film for a few months and am now planning on getting a Micro 4/3 Olympus camera soon. One question I have is whether or not I can use my existing M42 mount lenses on the new ...
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3answers
170 views

Why is that the wider the aperture of a lens is, the more we can see through narrow cracks and crevices?

Example I took at 85mm f/1.4 on APS-C sensor:
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1answer
70 views

All-round budget lens upgrade [duplicate]

I'm looking for a decent all-purpose lens to replace the 18-55mm kit lens on my Canon EOS Rebel XTi (400D). I'd like to keep the price as low as possible but something with a half-decent zoom and IS. ...
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2answers
162 views

Are there lenses which can give 180° fisheye circle with a cropped-frame camera?

I have a Canon EOS 1100D, and I'd like to take photos of the whole sky dome. Currently I'm using the Belomo MC 3,5/8A lens. It has 180° angle of view, but that's only true for full-frame cameras, and ...
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2answers
132 views

What to do with my collection of old third-party Pentax zooms with Canon camera?

I just dug 4 lenses out of the closet with my old film Pentax. I have the following: Quantaray 35-80mm f4-5.6 Quantaray 70-210mm f4-5.5 Albinar Macro Zoom 80-200mm f3.9 Promaster AF 100-400mm f4.5-6....
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4answers
936 views

Why is a lens darker than other ones when applying the same settings?

I own a Nikon D500 DSLR, with a Nikkor 16-80 mm 1:2,8-4E ED VR lens. I noticed that this lens, when applying exactly the same settings (same ISO, same aperture, for instance F8.0, same Shutter speed, ...
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5answers
153 views

Is 35mm on a cropped sensor good for fashion photography?

I am quite amateur with a camera but I want to become good in fashion photography. A top model has agreed for a photo-shoot for free and in return she wants me to make a portfolio. We are planning to ...
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0answers
35 views

Can I adapt my 38mm auxillary lens microscope to use more widely available 42mm ones?

I have a Bausch and Lomb/Leica StereoZoom 4 microscope that I would like to use for microsoldering and occastional photos. Unfortunately, it only has 10X eye pieces and no auxillary lenses or ...
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3answers
3k views

How were pictures turned from film to a big picture in a picture frame before digital scanning?

How did people after taking a picture with film and doing the chemical processes, get that small film image to become a big picture that could be framed and hung before the invention of a digital ...
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1answer
69 views

What defines an “objective”?

I'm not experienced in photography and would like to get some knowledge about the terminology. My question is: What defines an objective? Or: When would you define something as an objective? I mean, ...
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4answers
3k views

Why is Nikon 1.4g better when Nikon 1.8g is sharper?

I am new to photography (just 3 to 4 months of experience) and I am looking to buy a new lens (either 35mm or 50mm, but mostly 35mm because I have already decided Sigma 85mm f/1.4 DG HSM Art Lens for ...
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3answers
197 views

Does anybody know what these bright curved lines are?

Shot with the Zeiss 35 2.8 on my A7iii. Any input is much appreciated! Also, here is some other shots I did, with some other settings too.
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1answer
33 views

Focus Issues Using a C mount Filter on a CS Lens

I'm trying to use the Arducam 8mp with CS mount with a 25.4 C-Mount Filter, but I am unable to focus the picture. The filter fits perfectly and still leaves room for the lens to screw in. It says in ...
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3answers
96 views

After market mods for the Petzval 85 Lomography lens?

So I bought a Petzval 85 Lomography lens second hand. It has a Canon EF mount. Before I bought it I checked that there were EF to MC/MD mount (my camera) adapters. A quick google showed they are ...
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2answers
116 views

Hasselblad 250mm mounted on my nikon full frame camera… what's it's effective focal length?

Hasselblad lens was made for 120 or 220 roll film... if I successfully mount it to a full frame 35mm camera, how long is the lens? What it's effective focal length? I just don't know the math... ...
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19 views

Can there be any issues in using Lumix G 25mm f/1.7 ASPH with Oly OMD10 mark 2? [duplicate]

I plan to get Lumix G 25mm f/1.7 ASPH for Olympus OMD10 mark 2. Should I expect any reduction in performance since I am not using Lumix lens on Lumix camera? I googled but did not find any concrete ...
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2answers
159 views

Panasonic Lumix G 25mm f/1.7 ASPH vs Olympus M. Zuiko 25mm f/1.8

I want to understand what are the advantages of Olympus M. Zuiko 25mm f/1.8 over Panasonic Lumix G 25mm f/1.7 ASPH because Panasonic is twice as cheap. Looking at specs those are pretty much the same ...
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3answers
104 views

Good lens for D800E for outdoors and travel

I almost don't know anything about lenses and cameras and photography, I just have D800E camera and I want to buy a lens that I can shoot photos of my family in travel. I have "Nikon AF FX DC-NIKKOR ...
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1answer
344 views

Canon 50mm 1.8 lens not autofocusing on *one* camera

I have a Canon EF 50mm f/1.8 STM lens than when attached to my 100d doesn't autofocus. I presumed the motor had gone on the lens, as it had previously worked fine A friend has recently let me ...
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1answer
206 views

How to fix balsam separation?

How can balsam separation between glued elements be fixed? I'm planning to try to fix a couple lenses because what else am I going to do with them? It's about looking nice, optimizing image quality, ...
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1answer
96 views

Panasonic Lumix G 42.5mm F/1.2 vs Panasonic Lumix G 42.5mm f/1.7 ASPH Power O.I.S

How much of a difference these two lenses will make in photo quality and what will be the difference? I am a newbie in photo and I am looking to invest in a nice lens for 4/3 that has max features in ...
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1answer
208 views

“Stack of Primes” vs “Honorary L” – How do these two 35-105mm f/3.5 lenses compare?

In the film era, which lenses people choose depends on which cameras they have (or vice versa). Nowadays, with mirrorless cameras and adapters, people can use nearly any manual lens they want with ...
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4answers
229 views

What options are there for travel walkabout lenses for Canon 5D Mark III?

I recently upgraded my camera to a Canon 5D Mark III, and now my kit 18-55mm lens no longer fits. I’m looking for a general, travel, walk about, portrait and landscape lens. I was thinking about 24-...
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1answer
191 views

Washed out, low contrast pictures on 35mm

I've been shooting film for a while on a Pentax K-1000. I usually use Portra 400, I always develop at the same lab and I always refrigerate my film, but recently I got back a batch of pictures that ...
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2answers
1k views

What is the Angle of View of the iPhone XS rear camera?

What is the angle of view of the wide-angle iPhone XS rear camera? I tried searching for this information on google, but I was unable to find a specific number (just that wide-angle lenses are ...
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1answer
80 views

What is black substance on inner surface of front lens element?

I've noticed a old few lenses have some type of black substance (residue, coating, or powder) on some of the elements, especially the inner surfaces between the first and second element. The substance ...