letus prism?

[d4v1dz33]

what kind of prism is used in the letus flip, or the ps technik 35mm adapter?

 

[rpster]

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]

some use penta prisms and mirrors, some use just mirrors... theres a few different ways to do it.

 

[d4v1dz33]

hmm, it actually seems pretty simple now. and this design looks like strangely familiar...

 

[setarcos]

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]

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