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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79 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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2answers
121 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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2answers
85 views

Is the Canon EF 24-105mm f/4L IS USM lens parfocal or not?

I read a review of the Canon EF 24-105mm f/4L IS USM lens. It said: Focus shifts while zooming. Zoom before you focus. Surprised by this (I don't recall ever seeing the focus scale shift while ...
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2answers
155 views

Would adding an external lens allow one area outside the focal plane to be in focus?

I’m doing high speed scientific imaging. I have a camera mounted in a fixed location with a Micro Nikkor 105mm lens. It’s viewing a fixed subject that has a small mirror oriented 45 degrees underneath ...
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0answers
43 views

How can I tell whether or not a lens has focus breathing?

So recently I got a 90mm macro lens, installed a focus bracketing app onto my camera and let it run. Unfortunately, turned out that this lens has focus breathing which means the actual zoom level in ...
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1answer
62 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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2answers
535 views

How much of a difference is there between photos where perspective is fixed in post as opposed to being shot with a tilt lens?

I've been doing some architectural photography and indoors with the Nikon 14-24 f2.8 lens. Most of the time I can get my camera high enough to frame my shot and keep vertical lines vertical. But ...
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1answer
8k views

How to differentiate between a VR and VR II Nikkor lenses (e.g., 55-200 VR and 55-200 VRII)?

I want to know how can I differentiate between VR and VRII lenses. Nikkor has been providing a lens of same focal lengths 55-200 with VR and VRII. Below is the VR II product pic from Nikon's website. ...
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2answers
44 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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3answers
92 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
945 views

What exactly is this light artifact/flare?

I have an old SMC Pentax-F 50mm F1.7 that I like to use with an adapter on my APS-C camera for portraits. It looks great, even though it has somewhat heavy CAs at f/1,7. On some backlit portraits, I ...
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0answers
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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3answers
208 views

In photo taken with a prime lens, what is the cause of the “zoomed” bokeh appearance?

This image was taken with a Vivitar 24/2 (Kiron) prime lens. The lens is sharp. The focal plane is reasonably flat, and there is barrel distortion. The bokeh balls have an oval shape in which the ...
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1answer
151 views

How wide does the front element of a lens have to be, given the focal length and the aperture?

Clearly, a lens with focal length F and aperture 1/f has to be at least F/f mm wide. Maybe a little more to accommodate the angle of view. However, lenses tend to have wider front elements than F/f. ...
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0answers
23 views

Does crop factor affect focal distance for APS-C lenses? [duplicate]

I just found my interest in photography, and am about to buy myself a used DSLR. I did some research on what equipment would suit my preferred motives, and came to the conclusion that 35mm focal ...
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2answers
110 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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3answers
138 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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1answer
1k views

How to tell the difference between the Canon 18-135mm and the STM version?

I am looking to buy the Canon 18-135mm IS STM lens off eBay, and want to know if there are any outside visual differences that I can look for to make sure I don't get ripped off and buy the non-STM ...
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2answers
133 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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6answers
1k views

Why is the area in focus in front of the focus distance narrower than behind it?

I guess the title and the picture explain my question well.
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5answers
1k views

How to maximize the blurred background look with a distant subject (for example, 10m away)?

What lenses do I need in order to achieve the amount of bokeh that's on the image below? I am quite new to dslr photography, and I want to buy a new lens. My main objective is to get strong bokeh ...
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1answer
83 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 ...
2
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1answer
35 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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1answer
127 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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4answers
1k 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. ...
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4answers
3k views

How can I find the right lens cap for my lens?

I own a Nikon D3000 Camera with the AF-S 18-55mm VR Kit Lens. Last week I lost the lens cap and now I want to buy a new one. But when I went to this online store, I got confused with the different ...
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2answers
13k views

What is the effect of lens haze on images?

I'm considering buying an old manual focus prime lens for my DSLR. I've noticed that they're often listed very cheap if they're described as "slightly clouded" or "hazy". I would like to understand ...
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0answers
22 views

Nikon lens rattles [duplicate]

I have Nikon 18-55 AF-S VR lens. The other day I heard some rattling from the lens while turning the camera on. Also, there is a little bit of a shake on the view finder. Everything else is working ...
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3answers
144 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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2answers
5k views

Why is my lens making a ticking sound?

My Canon EF 50mm 1.8 lens is making a noise I never heard before. It takes pictures and focus as usual but produces a constant ticking noise when using live view. I honestly have no idea what could ...
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3answers
7k views

Best lens for taking pictures of surfers

I'm just trying to decide which new lens to get. I need to take surf and windsurf photos from onshore. Sometimes 300 mm is enough but there are many times they are too far away. I have a sigma 70-300 ...
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2answers
30 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
65 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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1answer
139 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
44 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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4answers
326 views

Which lens to use on which camera for wildlife photography?

I'm a enthusiastic newbie photographer - 2 camera's and 2 lenses, I would like to know which lens to use on which camera to get best results when shooting wildlife. Canon 650D and Canon 6D - lenses ...
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0answers
47 views

Which lens on aps-c vs full frame bodies for safari? [duplicate]

I'm going on safari and i have 2 camera bodies. A D60 and an A7. I'm trying to figure out if I should put the zoom on the D60 and a wider angle lens on the A7 or vice versa. My concern is that ...
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2answers
383 views

Is Tokina “Exchangeable” lens compatible with both Nikon & Canon DSLRs?

Can someone please explain if the following Tokina "Exchangeable" lens (Tokina 14-20mm F2) would be compatible with my Nikon D500? If yes, will it perform as if it was a dedicated Nikon mount? I ...
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3answers
165 views

Sigma DC 18-250mm Macro HSM Lens Autofocus not locking to let me click the picture

I was travelling on a trip with my camera. One day I was using my Sigma DC 18-250mm Macro HSM lens on Canon 70D in autofocus mode to take a picture. When I pressed my shutter button halfway to focus ...
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3answers
4k views

Since it's not “focal length”, what is the term for the distance at which things are in focus?

I was under the impression that the “focal length” of a lens is the distance at which stuff appears in-focus. (E.g., perhaps I set the camera so that objects 3 meters away appear sharp, ...
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5answers
236 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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2answers
46 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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14answers
132k 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 ...
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7answers
277 views

Are there add-on lens accessories which collect additional light, as a parabolic microphone can be used to gather more sound?

I recently imagined a useful accessory. Suppose you need an fast shutter and low ISO photo, but your APS-C camera doesn't help much, nor does your telephoto lens with very small aperture, in the ...
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2answers
46 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
50 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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4answers
1k views

Variable focal length for macro lenses?

True macro lenses come in fixed focal length. Are there any macro lensens which have variable focal lengths? And please explain why yes or why not?
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5answers
7k views

What does a hexagonal sun tell us about the camera lens/sensor?

In this picture, we see that the sun comes out as a hexagon. I am sure it is not arbitrary. What does the hexagon tell us about the instrument that captured the image?
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1answer
106 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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4answers
6k views

Will Canon Cameras fit all Canon lenses?

I have a Canon Rebel T3i. I have the standard lens. I am looking to buy a telephoto lens that won't break the bank! I am looking at a Canon 55-250 telephoto lens. Is this a good quality lens,and will ...