Questions tagged [projection]

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4
votes
2answers
110 views

Does a slide made from color reversal film take damage when used for several hours in a slide projector?

So I'm planning on projecting slides made from color reversal film for a long continuous amount of time in an old fashioned slide projector and was wondering how much damage the heat from the ...
2
votes
1answer
163 views

Is there a way to produce this “little planet”-type self portrait in a single-exposure?

The BBC News article UK Antarctic meteorite hunt bags large haul shows this ultra wide angle and likely "little planet"-type of self portrait. I can't understand how this effect is produced. While ...
1
vote
1answer
245 views

Pixel diameter of a given field of view calculation equisolid (equal-area) fisheye lens

I have a 180° equisolid (equal-area) fisheye lens with a focal length of 8 mm. I want to crop images to a circle defined by an angular field of view from the zenith angle of the lens (i.e. the middle ...
0
votes
2answers
89 views

What JPEG settings for projection with Epson EH-TW5210?

I shoot in raw and edit with Lightroom. What settings, such as resolution and aspect ratio, should I use to export JPEGs for presentation using an Epson EH-TW5210 Full HD 1080p, 1920 x 1080, 16:9 ...
1
vote
3answers
205 views

How can I make mirror images of digit camera image files?

My problem is that I am using a SONY a6000 mirrorless ILC and eyepiece projection to take images of solar system objects using a Schmidt Cassegrain Telescope. (SCT). Prime focus photography with an ...
1
vote
0answers
188 views

How to determine the projection (Stereographic, equidistant etc.) of my fisheye lens?

I have a Fujinon FE185C057HA fisheye lens and I want to know its projection. Is there a software tool I can use to do this? I have the lens with me so I can take some pictures with it. I just need a ...
3
votes
1answer
593 views

Did nitrate film stock provide different/better B&W and color projection quality?

The NPR News item What's The Issue With Nitrate Film Stock? It's Combustible describes substantial effort made at the 2017 TCM Film Festival to upgrade a projection booth in order to more safely ...
1
vote
1answer
2k views

How to convert Ricoh Theta equirectangular pictures to rectilinear? [duplicate]

I would like to extract a portion of an equirectangular 360x180 panorama taken with a Theta S and convert it to what I think is a rectilinear image (a picture where straight lines are shown as such ...
4
votes
3answers
3k views

How can I test that the image is inverted in a pinhole camera?

I learned that a pinhole camera inverts the image on the film strip: Is it to possible to test if the image gets inverted without the film strip on which the image is projected? For example: I made ...
2
votes
2answers
2k views

How to un-spherize an image using Photoshop?

Assume I have a traditional panorama. I use a spherize technique (e.g., in Photoshop) to produce a spherical image. Some time later, I want to take the spherical image and get back the landscape (...
5
votes
2answers
2k views

What is the relationship between field of view and focal length for fisheye?

What is the relationship between the focal length and field of view for an equal-area ("equisolid") projection fisheye lens? Alternatively, what is the relationship between the 180-degree image ...