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0
votes
5answers
101 views

How to work out the base “zoom magnification” of a lens? [duplicate]

I've come from 3x Zoom magnification land and am having a hard time adapting to all these complex "mm" systems. I'm thinking about buying some lenses to enhance the range of zoom of my Sony A5000 ...
0
votes
3answers
70 views

Why can my Nikon D3300 write to the card, but it's read-only on the computer?

Couple quick points (after a lot of googling with no answer): It's not the switch. The switch on the card is in the unlocked position. I just checked again, just to be sure. All the similar problems ...
0
votes
1answer
56 views

Color shift on the same photo between my mac and my iPhone

I just finished editing a picture and saved it in JPG on my Mac, which look perfectly fine. I sent it to my iPhone and the color completely shifted and look dull. I was wondering what could make such ...
1
vote
5answers
161 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 ...
1
vote
2answers
70 views

Software to change perspective of image of a whiteboard (or some other plane) to look 2D

Let's say I have a whiteboard in a room full of people. I want to take a picture of the whiteboard but there are people in the way so I can't take a picture of the board straight on. I'll have to ...
3
votes
3answers
123 views

How do I chose the right “correction eyepiece” when I need to go past the furthest left on a Nikon viewfinder?

I want to buy a Correction Eyepiece to correct my view. and I am hesitated between (-2.0) the minus diopter and (+2.0) the plus diopter and I don't know what to choose. I've got my Nikon camera ...
3
votes
3answers
455 views

How to break mental models when taking pictures?

I've started to learn photography and I start to appreciate what makes a good picture. One of the problems that I've noticed is how to look to the world. For me, taking a picture is a kind of tunnel ...
1
vote
2answers
110 views

Why don't cameras have automatic eyepiece covers?

The question is clear and I am not sure how to further explain it. Why don't cameras have internal automatic eyepiece covers?
0
votes
1answer
87 views

What is an electromagnetic diaphragm?

What is an electromagnetic diaphragm, how it works, and how is it different with regular diaphragms? A specialized electromagnetic diaphragm mechanism operates in precise sync with the camera's ...
-3
votes
0answers
57 views

“spy” lens PowerShot G16

Hi there i recently bought a PowerShot G16 and wanted to buy a lens that would let me photograph people without their acknowledgement. Ive google with no success. However i did found Opteka Voyeur ...
0
votes
1answer
46 views

Where can I buy photographic film in Prague, CZ?

I'm currently in Prague and, like every self respecting film photographer out there, I forgot to pack my rolls of film. Is there anywhere I can purchase BW film (135 and 120) in Prague? I'm looking ...
1
vote
0answers
17 views

Remote Control for Sony NEX 5 with bracketed images

Most remote controls that I've tried with my Sony NEX 5t only allow for a single shot shutter action. I'd like to be able to show bracketed images with a remote control. Are there options on the ...
2
votes
0answers
46 views

Is LR/Enfuse plugin for Lightroom redundant now that Lightroom has HDR merge feature?

I shoot real estate photography and recently learned about a plugin called LR/Enfuse, which is marketed as a tool to "blend multiple exposures together directly from within Lightroom" for higher ...
5
votes
8answers
227 views

How can I clean the smell of cigarette smoke from my camera body?

I just bought a used Canon 600D, and one of the first thing I realized when I tried it out is that the body reeks of cigarette smoke. It smells like layers upon layers of nicotine are stuck to the ...
3
votes
2answers
37 views

Will I get full functionality from a Canon 600EX-RT flash with a ST-E3-RT trigger on an Rebel XS?

I have a Canon Rebel XS (1000D) and I use the 430exII flashes with the Cactus V5 transceivers. They all worked well, but of course with no TTL — everything, everytime, in manual. I have achieved great ...
0
votes
0answers
31 views

How can I get a fixed short exposure ( < 2s) with a GoPro Hero 4 Black?

Does anybody knows about way to fix or manually set the exposure of a GoPro Hero 4 Black (FW HD4.02.02.00.00). I want to set short exposure (< 2 sec), so that each shot has the same parameter. ...
9
votes
3answers
769 views

Is there a lossy compressed file format for 16-bit dynamic range images?

I'd like to aggressively compress some scientific 16-bit grayscale image files, but without reducing the dynamic range. Is such a thing possible? I understand that JPEG format uses lossy, and ...
0
votes
1answer
71 views

Why did my Canon 1000D stop working in full auto mode, when it still works in P, Av, etc.?

It's my 7th day with my second hand canon 1000D. But now it stopped catpturing picture in full auto, portrait, close-up, landscape, night portrait, sports, flash off modes in autofocus mode. When i ...
4
votes
2answers
664 views

How can I eliminate white glow/halos surrounding bright objects?

I recently took this picture and was frustrated by the white glow coming from the man's shirt. I realize it's a high contrast scene, but I don't understand the science behind why the shirt appears to ...
1
vote
5answers
141 views

Diffuser for travelling?

I am going to travel abroad in a couple of months and I am considering, since I will take my photo-backpack with me (Tamrac evolution 8), to buy a diffuser for a Yongnuo 560 Mk III flash. Most of the ...
2
votes
2answers
121 views

What should I look for in a camera which could cover all of astrophotography, microscopy and general purpose photography?

I am new to photography but I have done a lot of microscopy (confocal, light, etc...). I am familiar with optics and image processing. I want to set-up a telescope at home and maybe in the future a ...
0
votes
0answers
16 views

How do I get Darktable to read my external hard drive? [duplicate]

I try to download Darktable with hopes of working with Canon CR2 RAW files but I can't get it to even recognize I have a hard drive in the USB port. I know that it's working because I can manipulate ...
0
votes
0answers
49 views

Is there an open source camera data repository?

Hi I'm developing an app which utilises image metadata. Sometimes users' images don't contain the required metadata, because they don't transfer photos via the preferred means. I'm wondering if there ...
1
vote
2answers
49 views

What do I do if recovery software doesn't find any files to recover on SD card?

I accidentally formatted my memory card before realizing I hadn't copied the photos and video from it. Since I realized right away, I had not used the card and there is no chance for overwriting ...
0
votes
1answer
52 views

How do I take the right exposure quickly with Nikon D5300 and old AI-S Lenses?

I've inherited an interesting set of old AI-S lenses from my dad. I use them on my Nikon D5300. They do work, but only in fully manual mode. It's cool that I can use those lenses but it takes me a ...
3
votes
1answer
314 views

Why are ISO settings not available/grayed out on Nikon 5100 in auto mode?

I have a Nikon 5100 and the option to change the ISO settings on Auto mode isn't available. The option is grayed out and it's stuck on auto. The ability to change ISO setting is only available when ...
2
votes
1answer
53 views

How can I convert a panorama to “Google Sphere” / Panorama for “Google Views”?

I have this panorama: https://www.dropbox.com/s/1e0qz92jsb4xibe/test-3000x1500.jpg?dl=0 I edited it in Photoshop and uploaded it to Google, but it isn't recognized as a panorama any more. That's why ...
3
votes
2answers
123 views

Can a Samsung NX300 shoot without a lens, for attaching to a telescope?

Can I take pictures on my NX300 without a lens attached? I have read threads about this, however my issue is somewhat different. I want to attach my camera to my telescope, and take astro-pictures. I ...
3
votes
0answers
36 views

Where can I find information on the Pentax Q lenses serial protocol?

I'm searching for detailed information on the Pentax Q lenses (any, but I'm especially interested in the 5-15mm-lens) serial protocol, which controls focus/zoom/aperture. So far I have found nothing ...
3
votes
3answers
105 views

Why is my camera focusing fine in liveview but getting it wrong with the viewfinder?

When I first got my Yongnuo 50mm f/1.8 it would not focus through the viewfinder. It will always miss (95% of times). Yet it worked fine in liveview. And now, recently, I started noticing the same ...
0
votes
2answers
70 views

Macro/infant photography lens for D5500 [closed]

I currently have a Nikon D3100 with the kit 18-55mm lens, which I have decided to sell. I am looking to start getting more 'into' photography, and me and my fiancee have a baby on the way which we ...
0
votes
2answers
97 views

Why does my Sigma lens make a high-pitched ringing noise on my Canon camera?

I have a Canon EOS T3i 600D. When I use a Canon-branded lens (18-55mm), the camera works well. When I change to the Sigma macro 18-250mm and turn the camera on, I can hear a ringing noise, like ...
0
votes
2answers
79 views

How can I change the eye color in a photograph? [closed]

Is there any way how I could change the eye colour in a portrait picture? Would like to know all the ways that I could use to edit.
0
votes
1answer
48 views

Readout time vs Frame rate of CMOS sensor

In many articles about CMOS sensor, I usually find that the relationship between readout time and frame rate is: (1) Readout time=1/Frame rate But Jia, C., & Evans, B. L. (2013, December) ...
0
votes
2answers
81 views

When does the first row of the next frame of CMOS sensor begin its exposure?

I want to ask about the starting time of a new frame in a sequence of frames captured by a CMOS sensor. Assume that the readout time of the entire sensor is 10ms, and the exposure time is less than ...
1
vote
3answers
99 views

Night Sky SuperResolution (instead of star trails) - possible?

I don't know if this is possible, or runs into fundamental limits of sensors and photo sharpness. I want to "pretend" that I have a fancy night sky motorized rig - through software. Take a few ...
0
votes
0answers
46 views

How to open CR2 files that were not properly pulled from memory card [duplicate]

So I'm very new to all this so please understand my pure panic here... During a shoot the other day I had to quickly dump a card on my hard drive before erasing it and continuing shooting. The images ...
3
votes
2answers
190 views

How can I tell if a Canon lens is made in Japan?

Are there physical differences in or on Japanese Canon lenses that would indicate they are from Japan? And how do I identify a Canon lens that was manufactured in the US?
-1
votes
0answers
34 views

What is a good resource for used lenses other that eBay, Amazon, or local store? [duplicate]

I am trying to find a decent buy, sell, trade forum, group, or something along the lines that is a good resource for photographers to find equipment.
0
votes
1answer
51 views

how to calculate “FocalLenIn35mmFilm” with limited metadata

Im creating an app that uses "FocalLenIn35mmFilm" to calculate feild of view(FOV). unfortunately not all photographs contain this property in their meta data, the Motorola Nexus 6 is an example. The ...
0
votes
2answers
114 views

How do I connect Leica Summicron-M 1:2/50 E39 lens to Canon EOS 5D body?

Could anyone recommend what I need to buy in order to connect a Leica Summicron-M 1:2/50 E39 lens to a Canon EOS 5D body? Do I need a bayonet lens adaptor and if so please let me know which one?
0
votes
1answer
81 views

Camera sensor size vs pixel size and focal length [closed]

I've already seen the answer about the crop factor. I'm writing a small software for motion tracking (from two cameras, videos) in 3D space and research. To do that, I need some information about ...
0
votes
1answer
64 views

Nikon D3100 Squeaky Lens Problems?

I've been using my Nikon D3100 and it all worked fine, until today, I tried to take a picture and pushed the button and started making a noise like the lens was working when I had it set to Manual I ...
1
vote
2answers
91 views

In what type of conditions do I use a polarizer on a 300mm lens?

I found the questions relating to polarizers, but haven't found any info on a 300mm zoom lens with a polarizer. Is this because it is not suggested to be used on 300mm zoom lenses? I use this lens to ...
1
vote
2answers
40 views

How to fire a Pentax AF 360 FGZ flash with a canon 7D camera

I have a Pentax AF 360 FGZ flash and a Canon 7D camera. Different hardware I know. But I want to be able to fire the flash, possibly using a remote trigger that would allow me to remotely take the ...
9
votes
3answers
453 views

Why are the colors so different in these two photos from different cameras even though I set white balance to the same temperature in Lightroom?

I have a Nikon D750 and D800e. I was attempting to run an ISO test on the two, but I can't put my finger on why the two came out with such a different color balance. Here was my method: Put D750 ...
1
vote
1answer
61 views

How do I clean the grime spots I'm seeing in my camera's viewfinder?

I was going to take photos one day and noticed these green/brown spots when I looked through the viewfinder of my Nikon D3200. So I took a couple shots to see if they showed up, but they did not. I ...
0
votes
2answers
66 views

What workflow can I use to work on photos on two different machines?

I want to work with photos, like in Lightroom, but I want to save my changes to the files directly. Even with RAW I want to adjust settings and save as jpg. It is enough for my private photos and ...
0
votes
2answers
40 views

Why doesn't my flash fire from the hot shoe trigger?

I have a Yongnuo YN-560 III and a pair of RF-603II (C3) triggers. I have a Canon Rebel T5i. I put one trigger on the hot shoe. When this trigger is in TX mode I get a blue comm light and I can fire ...
1
vote
1answer
204 views

How to manually select aperture and shutter speed but have auto ISO on a Canon 7D?

I want to be able to manually adjust aperture and shutter speed, but leave ISO being set automatically. How can I do this on my Canon 7D?

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