sparky: I'm trying to picture a periscope of sorts...............help me out here - what am i missing? If you look straight into a tube, the end of which has a mirror at 45 degrees, and it looks into a tube at right angles to the original tube, would'nt that give you a 90 degree view?
A periscope consists of two mirrors. I only want to use one.
A periscope uses a tube because it needs to keep out water. I'm not shooting underwater, so a tube isn't needed. I only need the mirror to fill the field of view.
Stephen T.:
NO. The firirst mirror at 45 bends the light path through a right angle. So with the camera level and the axes of the lens parallel to the ground, a 45 degree mirror in front of the lens will show an image of the sailing.
The principle involved is often stated as, "The angle of reflection equals the angle of incidence". Light from the ceiling hits the mirror at 45 and leaves it at another 45. This sadds up to 90 degrees, or a right angle.
Did I confuse or clarify?
Drew Bedo
www.quietlightphoto.com
http://www.artsyhome.com/author/drew-bedo
There are only three types of mounting flanges; too big, too small and wrong thread!
Take the easy route first. Google Camera Right Angle Mirror.
I don't know what diameter your lens has, but something along the line might be available.
There are some here.
There is a Sinar front surface mirror for sale on the bay, just listed. No, it's not mine!
Thread killer.
I think the first two will need a longer focal length than the OP wants to use and the rest are for the eyepiece end of telescopes.
It may be that the OP needs a larger front surface mirror mounted separately from the lens; cumbersome to be sure, but the final image is what is important. The old (very old now) large screen projection TV sets had a front surface Mirror that was several square feet. The SX-70 system Polaroids have a front surface mirror that might work for an external set up. The Polaroid MP-4 copy cameras had a right angle viewer that could be salvaged and used. The mirror in some other 4x5 right angle viewer could be salvaged and rigged.
If the need is imperative the possabilities are there. It may be that rigging a mirror based appliance is more troublesome than shooting straight up with a lightweight wide angle camera such as a TravelWide. Focal lengths available are 65mm and 90mm. How wide do you need to shoot?
Drew Bedo
www.quietlightphoto.com
http://www.artsyhome.com/author/drew-bedo
There are only three types of mounting flanges; too big, too small and wrong thread!
A laser reflector ~6x6 inches, mounted on an adjustable stand
http://www.ebay.com/itm/6-ADJUSTABLE...kAAOSwqu9VQSl7
Seriously; take a look . . .this could be perfict.
Drew Bedo
www.quietlightphoto.com
http://www.artsyhome.com/author/drew-bedo
There are only three types of mounting flanges; too big, too small and wrong thread!
FINDING a suitable mirror is not the issue.
HOW TO MOUNT IT is what I'm inquiring about.
See post #10...........Originally Posted by Jac@stafford.net
How does one attach anything to the front of the lens? If you would please tell us what lens(es) you are working with, and hopefully some measured dimensions such as front outside diameter, what size screw-in filter it can use (if any), whether it can use a compendium (because a part of it might be used), and so forth then we do not have guess just what issues you have.
Nikkor-W 65/4
Nikkor-SW 90/8
Nikkor-SW 150/5.6
Caltar-S II 210/5.6
I have adapter ring for all to use 77mm filters.
Posting Permissions
Reply With Quote
Bookmarks