View Full Version : letus prism?
d4v1dz33
01-15-2006, 10:03 AM
what kind of prism is used in the letus flip, or the ps technik 35mm adapter?
rpster88
01-15-2006, 03:34 PM
no one has ever posted on what the prism of the p+s technik mini35 is. (someone correct me if im wrong)
i have the letus35 flip and it appears to be 4 front surface mirrors.
natxbrotha
01-15-2006, 03:40 PM
some use penta prisms and mirrors, some use just mirrors... theres a few different ways to do it.
d4v1dz33
01-16-2006, 11:27 AM
hmm, it actually seems pretty simple now. and this design looks like strangely familiar...
http://img.photobucket.com/albums/v660/noedalmxy/FlipAdapter.jpg
Your drawing is correct, although the pentaprism extends above the lens (one of the pains) to allow focus on infinity. This is what it looked like in Sept 2004 (using a focusing screen not a GG and no macros either):
http://dandiaconu.com/gallery/album02/IMGA0078
Good for smaller lens cameras (Panny...) not big enough from PD150 and up.
Bill__Turner
01-16-2006, 04:13 PM
d4v1dz33:
Just to be clear for anyone thinking of DIY, this set up mimics what happens in a 35mm SLR and requires a Roof Penta Prism - not a standard Penta Prism. The 45 degree mirror corrects the image top to bottom but the roof is required on the Penta Prism to correct left and right.
Bill Turner