Questions tagged [zoom]

An optical 'zoom' or 'variable focal length' lens is one that has a range of focal lengths at which it can operate. "Digital zoom" is a technology which simulates optical zoom by cropping the image.

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1answer
793 views

How much difference is there between the Pentax DA 55-300 and FA 80-320?

I currently have a Pentax FA 80-320, and it's very nice to have a long zoom available. Lately, I've been considering "updating" to the DA 55-300. I also have the DA 50-200, so the lower end of the ...
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2answers
114 views

Better Circular Polarizer for Sigma 150-500mm APO HSM [duplicate]

I recently used my Sigma 150-500 lens to shoot my son surfing. I was using a circular polarizer. The shots all appear out of focus even though focus was good and depth of field was good, even though ...
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1answer
426 views

How to enlarge an object by x-times with an optical zoom

My camera employs a 30x optical zoom, with focal length ('f' from here on out): f = 4.3 mm to 129 mm. If I am at 1x and I see an object as 100 pixels, to enlarge it to 150 pixels, can I set the zoom ...
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1answer
537 views

How is the continuous (optical) zoom feature realised in the new iPhone 7 using two lenses

The new iPhone 7 Plus has a dual camera system with one 28mm and one 56mm. Usually in smartphones where the camera is compact, you do not have real optical zoom. So how is the zoom feature, which ...
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2answers
2k views

Difference between using camera's macro mode vs zooming in with a telephoto lens [duplicate]

I'm photography enthusiast, But I'm unaware of the difference between my camera's macro mode vs zooming in with a telephoto zoom lens What difference does it make when I zoom in with a telephoto lens ...
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1answer
2k views

What can cause massive overexposure on a Canon IXUS when zooming in?

I have been using Canon IXUS 130 for some years and it has been giving decent good photos and videos. Strangely, few days ago, whenever I use the telephoto zoom and take a picture, the picture is ...
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1answer
442 views

Canon 16-35 f/2.8L II zoom ring noise

I just bought this lens. Out of the box, it makes a little noise while turning the zoom ring left and right (different from the other lenses I have, almost a metallic kind of noise). It looks like ...
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1answer
797 views

Which 70-300mm f4-5.6 lens is “better?” [duplicate]

I'm looking for a budget telephoto lens and I'm wondering which of these two is the better option. They have very similar specs: Tamron AF 70-300mm f/4.0-5.6 Di LD Macro Zoom Lens for Canon Digital ...
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2answers
633 views

My Tamron 100-400mm f/4.5-6.3 jumps to f/6.7 beyond 360mm

I got a brand new lens today: a Tamron 100-400mm F/4.5-6.3 Di VC USD. I have mounted it on my Nikon D80. This lens seems to have a problem with its aperture: At 100mm, I can operate from f/4.5 ...
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1answer
755 views

Am I correct that photos from the 16-50 lens won't be much better than cropping photos from the 35mm prime?

I own a Sony NEX-5R, with the Sony 35mm F1.8 prime and the Sigma 19mm F2.8 prime. I'm deciding whether to buy the Sony 16-50 power zoom. To make that decision, I need to decide whether cropping the ...
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0answers
1k views

Where can I compare telephoto zooms? 200 vs 300 vs 500 mm?

I have a 200mm telephoto zoom lens. I would like to see the zoom distance between the 200mm compared to 300mm and 500mm. Are there any sample comparison images anywhere I can look at?
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1answer
562 views

Why is my Nikon 18-300 lens not focusing at higher focal lengths?

I found a similar question about the 18-200. Someone suggested screwing the front element tighter. Is it possible to do the same with the 18-300? My problem happens at 200-300mm. I am not sure how to ...
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2answers
910 views

Why don't DSLR camera specifications include a zoom ratio (e.g. 3x zoom) like compact cameras?

For example, there is no mention of the zoom here. I'm guessing that it's specified in some other specification. If so, what do I look at and how do I compute the zoom from it? I've looked at a few ...
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3answers
6k views

Why does this lens lose focus when you zoom in but not when you zoom out?

This is regarding the Sony 18-105 E-mount constant-aperture zoom. I took at photo at 18mm, focusing manually: I then zoomed to 105mm, and took another photo, keeping the same focus: Notice that the ...
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6answers
20k views

What are the pros and cons of constant-aperture zoom lenses, for a relative beginner?

I use a Sony NEX-5R, and I bought the Sony 18-105 F4 constant-aperture lens. I'm aware that the constant-aperture F4 gathers more light than, say a F3.5 - 5.6, and it gives you more control over the ...
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3answers
6k views

Zooming in meters [duplicate]

I'm new to photographing. But I'd like to know what 10x zoom means in meters. I know that it means the picture is enlarged 10 times, but what does it mean in meters? I mean does it mean like the ...
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3answers
14k views

Why don't the zoom buttons work on my DSLR?

I am a newbie to the new camera I just bought. It is a Nikon D5200 it has the original lens that came on the camera a 18-55 lens on it. My question is when I turn the lens to the 55 and then push the ...
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3answers
149 views

What lens would I need to photograph a very distant cathedral dome?

I want to be able to photograph the dome of St Paul's cathedral from King Henry's Mound in Richmond Park. Would a telephoto or zoom lens be the best, what focal length/zoom would be the best for ...
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2answers
221 views

What are the technical limitations that prevent lens manufacturers from producing 70-300mm f2.8?

70-300 f2.8 lenses don't seem to exist. What are the reasons behind that?
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2answers
533 views

Does image quality on compact cameras degrade when zooming in?

I have a Panasonic Lumix LX5 which I find generally produces good photos. However I have noticed on numerous occasions that the image quality when at the limit of the optical zoom (not using the ...
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2answers
353 views

What are particular potential problems to watch for when using a telephoto zoom?

I recently got the Canon EF-S 55-250mm IS II lens as a complement to my 18-55mm kit lens for my 550D. I was looking for some advice\best practices for using a telephoto zoom, any associated ...
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2answers
233 views

200mm on 48MP body (with 2x digital zoom) vs 400mm on 24MP body

Is the "quality" from a 200mm lens on 48MP body (after a 2x digital zoom) going to be same as one on 400mm on 24MP body? Assuming the same apperture
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3answers
195 views

Variable Aperture Zoom Lens Dials

I'm new to photography and recently won a bid on a Nikon D70 with a Nikon AF Nikkor 24-120mm 1:35-5.6D lens. I know the lens has a variable aperture. What I can't figure out is what the top sets of ...
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2answers
457 views

New camera won't focus while zoomed in, old one focuses perfectly. Why? [duplicate]

I take photos of computer hardware for sale on ebay. I had been borrowing a camera for photos (Olympus SZ-16) and the camera will be able to focus while very zoomed in to a device while relatively ...
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3answers
219 views

How to focus on more objects at the same time while maintaining shallow DOF?

How can I focus on more objects, say three dogs sitting in front of you, while maintaining a nice background blur/shallow DOF? I have a kit lens ranging from 18-55mm with a variable aperture of f/3.5-...
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2answers
3k views

Why are my pictures noisy when zoomed at 1:1 in Lightroom 4?

I am shooting with Nikon D7000 and 18-105mm lens and RAW only not (RAW+JPEG). When I import my pics in Lightroom 4 and zoom it at 1:1 both in Library and develop modules I see a lot of noise, though ...
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5answers
714 views

Are prime lenses sharp across the whole frame while zoom lenses are soft in the corners?

Somebody told me that there is a difference in sharpness between a zoom lens vs. prime lens. A 58-200mm will give sharp focus in the center of the frame but blurry performance at the corners, while ...
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2answers
3k views

How to fix Canon 17-40mm F4L loose zoom ring?

I bought a used Canon 17-40mm F4L a while ago, and I just noticed it had the Zoom Ring kind of loose and also a lot of my pictures that were taken at the widest were 19mm instead of 17mm
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2answers
286 views

What is the theoretical relation between zoom length and guide number for a flash?

The point of a guide number is to specify the relation between aperture number and distance. For zoomable flashes there are still extensive tables considering ISO number and zoom length. The ...
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1answer
210 views

42.8mm on Nikon COOLPIX P7700 > 55mm on Canon EOS 77D? [duplicate]

I have a Nikon COOLPIX P7700 and because it has been losing function due to wear and tear after 6 years, and I wanted a better zoom range for wildlife, I decided to get a Canon 77D DSLR so I could get ...
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3answers
840 views

Is there an EASY way to get geotagging with a compact camera without GPS?

Is there a compact camera with decent zoom (30x) with which it would be easy to have the photos geotagged? What is the best practice to have both good picture quality (use a compact camera, not ...
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1answer
268 views

Why doesn't the zoom ring on my Vivitar 75-205mm lens turn?

I bought a Vivitar 75-205mm zoom macro lens for Minolta MD yesterday without paying much attention to the seller's details: I bought it as a gift to someone important for me. She only has a 35mm ...
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2answers
3k views

Canon Sharp Zoom Lens for Fashion Photography

I am looking to buy a Canon L lens, preferably a zoom to cover various ranges and focal points. I had a look on the new Canon 24-70f4L and it looks fantastically sharp. However, someone mentioned on ...
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2answers
775 views

Is the used Nikon Nikkor 18-200mm lens I bought broken?

I bought the 18-200mm Nikon lens used through a reputable vendor through the mail. I purchased insurance just in case the lens did not work or was damaged in shipping. I'm not a professional but I ...
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1answer
1k views

Nikon AF 70-300 mm lens zoom broken, can it be salvaged?

So I accidentally dropped my Nikkor AF 70-300 mm lens on the floor (yes, stupid). Now the zoom ring does not work. When I turn it, nothing happens. However, I can slide the lens back and forth, and ...
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2answers
1k views

How to fix zoom creep in Canon EF 24-105mm F/4L IS USM lens? [duplicate]

I have the first version of the Canon EF 24-105mm F/4L IS USM lens. It has annoying zoom creep. If I walk around with this lens, with the camera hanging from my neck, occasionally the zoom ...
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1answer
176 views

What units are used for zoom and focus distance for the varifocal Dahua camera? [closed]

I've been working with an industrial Dahua camera and since I do not have a full model of how the camera works (and because I'm a complete newbie to cameras in general), a few elements are still ...
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1answer
2k views

How to fix a zoom lens that is sticky at a particular focal length?

I have the Canon 18-55mm lens. When I zoom out from 55mm to 18mm, the lens works fine until 22mm, where it seems to be stuck and you must then use a bit more force. I saw in many sites that this is ...
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3answers
972 views

How to get focal length from a camera specification which gives a value like “4.5-22.5”?

I am using a Sony W520 camera. The specifications mention Focal Length (f= mm) 4.5-22.5. What number should I take? The lower value or the higher? And if not both of them, then how to calculate actual ...
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1answer
156 views

Macro mode: Should I make sure the lens is all zoomed out?

It appears that on most compact digital cameras, the macro mode (flower symbol) works best (or only) when the zoom lens is at the widest setting (comparable to e.g. 35 mm). What is the reason? ...
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2answers
103 views

Cause of bokeh with dark ring and bright center

This is a detail from a photo that I took with a Fujifilm XF55-200mm lens. The lens was zoomed all the way to 200mm, and the aperture was wide open—f4.8. I wonder whether somebody knows the cause of ...
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1answer
214 views

Why does aperture change when I zoom my lens even in manual mode? [duplicate]

I have my Nikon D7500 set to Manual Mode. I can change the shutter speed and it maintains the setting. When I change the aperture, the setting is not maintained and varies depending on the zoom of ...
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1answer
430 views

How to soften a tight zoom ring?

After a fall, our Nikon Af-S 24-70mm 2.8G ED zoom ring got quite tight. It's specially hard to rotate it between 50 and 70mm. We can't send it to repair service, as we need it daily and have no ...
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4answers
2k views

Zoom conversion help? Superzoom vs Nikon 55-300 DX lens

I am going on a road trip over this summer and I'd like something that can handle being zoomed in a lot. I have a very capable Nikon D5200, and a 55-300mm telephoto lens that goes with it. However, ...
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1answer
4k views

Effective zoom of Sony 55-210 lens (e-mount for NEX series camera) [duplicate]

According to Sony's website this lens has a zoom factor of 3.8. I currently have an 18-55 lens that came with my NEX-3F that has a zoom factor of ~3.1. Since the 55-210 pics up where the 18-55 leaves ...
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1answer
653 views

What is cheapest way to get a 10-20× zoom range on a Nikon D5100? [duplicate]

Possible Duplicate: How do I decide on a camera/lens with high zoom range? There are a lot of relatively cheap ~ 300$ (with body) consumer cameras with mega-zoom features — i.e. lenses with a 10-...
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1answer
527 views

Zoom, Aperture size and focal length [duplicate]

I am very new to photography and have been working my way through a few books and magazines trying to learn how to use my camera more effectively. I keep getting stuck on the differences between the ...
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2answers
4k views

How does focal length relate to macro magnification? [duplicate]

I'm new to photography and would like to know a little more about zoom lens, The main thing I wonder about is this, I have a Fujifilm S4000 camera that claims to have 30x magnification. The new ...
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2answers
5k views

What level of zoom lens comes with a new Canon EOS 1100D?

I am a complete newbie to DSLRs. I am planning on buying a Canon EOS 1100D SLR with Kit (EF S18-55 IS II). (It's also known as the Canon Rebel T3.) I have a 10x optical zoom in my Point and Shoot ...
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2answers
1k views

Can a lens be a zoom lens and a macro lens at the same time?

I am planning to buy an entry level SLR camera, mainly for use capturing macro and portrait photos. However, I'm a bit confused by this lens which is described as "Tamron AF 70 - 300 mm F/4-5.6 Di LD ...

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