Use of 2 polarizers
Dec 11, 2023 12:49:25 #
jackpinoh
Loc: Kettering, OH 45419
User ID wrote:
Cross POLarizing does NOT cause vignetting. Thaz j... (show quote)
Where did I say cross polarization causes vignetting?
Stacking any type of filters can interfere with light entering at the edges of the lens. That is why filter venders offer low profile neutral density filters. I've never seen a low profile polarizing filter.
Dec 11, 2023 13:06:21 #
larryepage
Loc: North Texas area
Stan Fayer wrote:
Instead of using several ND filters is it posable to use 2 polarizing filters to restrict the light?
Despite the snide remarks, yes, this can and has been done. Years ago, i bought a gadget at a surplus store that was designed to mount on the eye pieces of a pair of binoculars. (I never could get them to work on mine.) Each side had a whole arrangement holding two pieces of polarizing materials that could be rotated with respect to each other. The two sides were linked together and the density of filteation could be adjusted.
Visual quality was OK for binoculars. Not sure what happened to them.
Dec 11, 2023 13:33:58 #
Dec 11, 2023 13:41:24 #
jackpinoh wrote:
Where did I say cross polarization causes vignetting?
I've never seen a low profile polarizing filter.
I've never seen a low profile polarizing filter.
Never seen a thin PL ?!? Heres one, pictured below ... but its from a manufacturor almost no ones ever heard of, so you might hafta go to a super special exotic vendor, like B&H, to get one. B&H is on an obscure little island on the US East Coast between New England and Pennsyltuckee ... but they do have a website.
Dec 11, 2023 13:45:09 #
Most of the damage done from the eclipse was caused by people who had set up their camera and lens on a tripod pointing at the sun while waiting for the eclipse. This prolonged exposure causes a lot of heat to build up and will eventually start burning through apertures, shutters, sensors and anything else in its way.
Two examples of damage from the last total eclipse in the US:
A 'burn' onto a camera sensor -
Melted aperture blades -
Two examples of damage from the last total eclipse in the US:
A 'burn' onto a camera sensor -
Melted aperture blades -
Dec 11, 2023 13:46:59 #
jimpitt wrote:
My question is simple.
Why reduce light?
Lenses more expensive increase light.
Why reduce light?
Lenses more expensive increase light.
I think I can decipher ESL and so I think I would hugely agree on that idea in *most* situations. OTOH, the sun is a really super bright subject during most daytime hours.
Acoarst a usable exposure for the sun will completely under expose everything else within the frame, so the image aesthetics photographing the sun would be severely limited for anyone foolish enough to try it, except perhaps very close to the horizon.
Examples of the sun near to the horizon abound all over the internet. A few such collected images are attached below:
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