glasses

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by Meysam                

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3
votes
1answer
99 views

Strange sharpening effect in B/W negative scan

I am scanning several rolls of B/W film and have noticed that a small number of shots have some sort of strange sharpening/edge detection behaviour which looks awful. The example below is from Ilford ...
1
vote
1answer
50 views

How do I resolve a Canon “error 99” that is not a lens issue?

My Canon 40D has an "error 99" when shutter button is pressed. Here is the list of things I've tried: change the battery shoot without CF card shoot without lens In all cases, the error comes ...
-2
votes
2answers
102 views

What creates a bright green orb “lens flare” with silver or metalic dots on it?

I am having a heck of a time finding anything on the internet that explains how and why a green orb with silver or metallic looking dots keeps appearing in my photos of the sky. I am taking these ...
0
votes
1answer
30 views

How do I remove PTGUI's black top/down circles on a QTVR / CUBIC?

I'd like to know how to remove PTGUI's black circle holes when converting an already flat 360 pano to an Equirectangular QTVR / Cubic. I do understand that the Top & Down generated images have ...
0
votes
1answer
107 views

How to achieve the super high contrast look of Thierry Le Gouès' Soul Album?

I'm curious to know how to achieve the high contrast look of Thierry Le Gouès' Soul album (please note: images are NSFW). I know this is probably done in post but I would like to know if there is a ...
-1
votes
1answer
81 views

How to calculate light output from strobe lights?

I have a medium size church room for doing standard wedding photographs and I'm trying to learn how to do the math for lighting. Over 1k of continuous lighting isn't near as bright as my two little ...
1
vote
1answer
27 views

Move uploaded photos from library to profile in 500px

I use 500px as my web photo archive. I've uploaded some photos accidentally in my library instead of my profile. How can I publish these private photos to my library?
-1
votes
2answers
161 views

Why choose an APS-C mirrorless kit over a full-frame SLR kit? [duplicate]

The biggest tradeoff between SLRs and mirrorless cameras is compactness for sensor quality. In particular, an APS-C mirrorless kit costs about the same as a low end full-frame SLR kit. There are lots ...
2
votes
1answer
82 views

The Purpose of the Length of a Tripod Plate

Context I'm debating on getting a tripod plate for a Nikon 400mm f3.5. Question For a teleprime such as mine, is there such as a thing as a right "length?" Kirk lists one that looks shorter than ...
0
votes
1answer
212 views

FX lenses on Nikon D500 or D7200 DX vs 1.4x or 1.7x Teleconverter on Nikon D750?

I have a Nikon D750 body, with the 70-200 2.8 and the 200-500 5.6 Nikon lenses. The two options I can think of are: (1) Buy a 1.4x or 1.7x teleconverter for my existing D750 (FX). (1.1) Approx. ...
0
votes
1answer
110 views

How to choose f-stop / depth of field? [duplicate]

I am fairly new to photography and I have read many "beginners guides" and watched youtube tutorials. One thing that remains elusive to me is how to properly pick what f-stop to use. I use a 35mm, ...
1
vote
2answers
63 views

Does changing the WB in post-processing affect noise?

I have a friend who took some macro photos of snowflakes with the WB preset to "Cloudy", but lighted from an 11-watt flourescent bulb. Snowflakes look more pleasing with a blue tint, rather than ...
0
votes
3answers
68 views

Are there more professional programmable (Android, etc.) cameras than the Samsung Galaxy? [closed]

I need a programmable camera device. I want take products photo for e-commerce with the fastly website. I bought a Samsung Galaxy (3G) camera. I developed a small android app. My app sends captured ...
0
votes
0answers
36 views

Is there an online comparison of available 35mm films

Is there a website that has a review of currently available 35mm colour films, with examples and preferably a description of their atmospheric, emotional, artistic qualities? I would be wanting to ...
4
votes
5answers
137 views

How does the inverse square law relate to the softness of light for portraits?

I am a bit confused. I understand that if you want soft lighting for portraits, you need to use a large light source compared to the size of your subject. So, I thought by bringing the light source ...
2
votes
4answers
106 views

Why do gray cards come with a black card and a white card?

Whenever I adjust my white balance during post processing I try to select a sample of 18% gray somewhere in my picture. In the real world, that color doesn't always exist in every frame that I ...
2
votes
2answers
102 views

Flash guide number f/stop calculation

I have been reading the B&H Speedlight Buyer's Guide. I am confused specifically about the guide number calculation. I understand the principle and how the inverse square law is used. Here is the ...
0
votes
0answers
56 views

Camera degradation over time in mobile phones

I am working on the concept that the color reproduction property of a camera in a mobile phone can shift over time as compared to what it used to be in a newly bought phone. So, came with some doubts: ...
1
vote
1answer
70 views

What type of pen or pencil can I use to sign a print on satin paper

I am having some prints done of some photographs for an art exhibition, the photos are mounted and framed, and the photo is printed so there is a small visible white border around the print before the ...
0
votes
1answer
74 views

Are any photographers known to intentionally make “creative” use of front/back focus settings of a camera?

A couple of weeks back I was testing my lenses for front/back focus, and an idea struck me: it's entirely possible to setup the camera to constantly back or front focus, so to permanently change the ...
1
vote
3answers
296 views

Is it possible to undo the editing of pictures of which you don't have the originals anymore?

I did much photoshopping on pictures, of which I can't remember the original. The originals are gone. Can I retrieve them still?
0
votes
0answers
42 views

How to consistently apply “global” color balance to multiple microscope images?

I have microscope images of similar samples, taken at different times with slightly different lighting conditions. Is there a way to apply a "global color balance" to all the images, if for example I ...
0
votes
3answers
52 views

Is there a difference in image when using a two different combinations of exposure time and diaphragm? [duplicate]

My camera, aimed at a motionless object, is mounted on a tripod. Do I get a different image by changing exposure time and the diaphragm in such a way that the total amount of light coming in stays the ...
0
votes
1answer
117 views

Photo resolution for a large canvas

I'm trying to resize a photo taken with a Canon 5D Mark III for a 36" X 72" canvas at 300ppi through Lightroom 5. I exported the photo at H: 10800 X W: 21600, but the printing company is telling me ...
1
vote
4answers
88 views

Why printing on 10x15cm paper always cropped?

I have Epson SC-P800 printer and I use LR for printing. I print on Hahnemuhle 10x15 photo cards which are 100x150mm. To crop image in LR I use 4x6 aspect ratio which is the same as 10x15 (1:1.5). Then ...
1
vote
2answers
106 views

How can I modify my NIkon D5500 so I can make a vintage lens auto focus?

I just bought a Nikon D5500 with 35mm f1.8. I also have a Nikkor 70-210mm AF (that doesn't focus automatically). I learned that using a TC-16A AF Teleconverter 1.6X might help but i was informed that ...
3
votes
0answers
92 views

7D noise levels. Can it get worse with camera age?

I have been using my 7D for 4 years now and never really noticed luminance noise but a couple of recent batches off photos with low ISO and nice bright sunlight conditions are yielding more noise in ...
3
votes
3answers
109 views

Attach camera via USB, or remove the cards from the camera? [duplicate]

I've always removed the cards from the cameras and used a high-speed good quality card reader, and find it totally strange to connect the camera via USB instead. A comment elsewhere prompted me to ...
-1
votes
1answer
73 views

Can you build a camera obscura indoors, to watch a play upside-down as it's performed? [closed]

I've seen Youtube videos of people who have converted a room into a camera obscura to capture images of skyline/trees/clouds, but couldn't you capture indoor scenes too? Or would you need bright ...
4
votes
3answers
167 views

Mercury transit at 200mm + UV + ND?

Will I able to see Mercury transit with a f/4-5.6 200mm lens (on APS-C)? I do not have solar filter and I don't have time to buy as transit will be on 9th May 2016. I'm wondering if I can use my UV ...
1
vote
1answer
22 views

Which flashes will fit an Olympus Trip 35?

I am looking for an as compact as possible flash that fits my Olympus Trip 35. There is an official one, but it costs several times what the camera is worth. I read up on Hot Shoes on Wikipedia, but ...
6
votes
1answer
122 views

How many SDHC card insertions/ejections does an average camera slot withstand?

The camera is used for a sort of technical shooting (to take a few pictures of a product and send them via e-mail immediately). This way it might udergo for about ~500 insertions/ejections of cards in ...
1
vote
0answers
14 views

How to position separate parts of panorama in spherical coordinates in AutoPano?

Autopano was unable to stitch few parts of my panorama. So, I am to fix them manually, but failing. My panorama consists of two pars, which were connected by AutoPano automatically, but it was ...
2
votes
2answers
88 views

How to prevent AutoPano from splitting my panorama?

I was trying to stitch 8 images and got the following picture: I.e., AutoPano decided picutres are not connected. How do I force AutoPano to connect them? UPDATE I have found the following ...
0
votes
0answers
64 views

Skewness and Kurtosis in an Image

I am working with textures in an image. I have implemented algorithms to calculate the skewness and kurtosis in an image histogram. Great, delighted with that. I am using RGB as my color model. I know ...
0
votes
3answers
94 views

Canon 7d & 24-70 ii - can't get a crisp or well exposed shot [duplicate]

As the title says, I'm shooting a canon 7d (mi) with the newly acquired Canon L 24-70 ii. I can't tell if I've suddenly forgotten how to shoot, or if both Green and Av mode are messing with me. I've ...
-4
votes
1answer
73 views

What filter was used on this photo? [closed]

Coul you please help me find out the name of this filter?
1
vote
2answers
65 views

How can I fix the broken prongs on my Eye-Fi SD card?

I have a Eye-Fi Pro X2 SD card that I got a couple years ago. I usually use Wi-Fi to transfer photos to my Mac (router connection not direct), but I was on vacation so I put the card into my Mac's SD ...
20
votes
4answers
3k views

Why buy prime super telephoto lenses instead of zoom super telephoto lenses?

35mm and 50mm primes make perfect sense to me: sharper images, simple operation, and framing can usually be handled by taking a few steps forwards and backwards. I'm struggling to see how one would ...
2
votes
2answers
92 views

What is the relationship between burst mode and shutter speed?

I shoot macro and recently have been interested in focus stacking, however with live subjects this becomes quite a challenge. Thus I'm exploring how burst mode actually works. What does the limit on ...
0
votes
0answers
47 views

How do I get my image with a dSLR mounted on a telescope into focus? [duplicate]

I have a Nikon D5500 and use a GSO Newtonian telescope with an aperture of 8", focal length of 1200mm and focal ratio of f/6. I will be using a 32mm superview telephoto projection eyepiece which is ...
1
vote
3answers
73 views

Options for a wide angle lens for Nikon D5000? [duplicate]

I'm not sure if all Nikon lenses have identical connectors across all models (amateur here), so I'm sorry if it's a silly question. I have a D5000 and I'm looking to do more night time photography ...
0
votes
1answer
32 views

What is the Nikon D3200's diffraction limit?

I'm new to the world of macro so do bear with me! I shoot pictures of fish through aquariums, so normally this means the lens is always perpendicular to the glass surface to avoid blurring. However ...
2
votes
1answer
104 views

Why do DPReview's charts show the G7X II as having an aperture around f/8?

I have a Canon G7X II camera, which has a 24-100mm f/1.8-2.8 lens. Why does DPReview's chart show it having an aperture of around f/8 at a focal length of 100mm?
1
vote
5answers
71 views

Can I use bulb mode for long exposures without having to hold down the shutter button?

I bought the Canon 700D recently and I'm really happy with it. Long exposure works just fine but for my purposes and just for experimenting I want to take very long exposures at low ISO for several ...
1
vote
1answer
33 views

Will a focal reducer help me image deep sky objects using an 8" newtonian?

Will a 0.5x focal reducer help me if i am imaging deep sky objects using a 1200mm focal length optical tube(f/6), 32mm super view telephoto extension eyepiece and a nikon d5500 with a sensor size of ...
3
votes
2answers
101 views

Is the Fujifilm x100 a good camera to start?

I decided to start exploring the fascinating world of photography. At first I wanted to buy an old film camera (like the pentax k1000) but finally, after talking with friends and also thanks to this ...
1
vote
2answers
65 views

.NEF Raw files open in Black and White

I recently went flying with a friend and took my Nikon D3300 DSLR up with me to get some aerial shots. As I'm still learning I set the camera to RAW+JPEG so I had some pics and could also have a mess ...
0
votes
0answers
27 views

white back ground [duplicate]

I am a retailer that is starting a web store. My problem is I'm not a photographer. I have taken several picture of my shoes in a photo booth that I have purchased.I cant seem to get the back ground ...
1
vote
3answers
66 views

How can I get a fade-to-white vignette with Polaroid film?

I want to try and recreate a filter effect similar to this. It's a partial nude, so potentially NSFW: http://3.bp.blogspot.com/-zWtPvzfTE9I/T2752kGAH-I/AAAAAAAAADQ/WYKtq1lfLmE/s640/scan012.jpg (The ...

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