telescope?

[tom_tong]

I understand that there is a sort of attachment to convert a R lens into a telescope. Would knowledgeable friends here be kind enough to advise if there is similar thing for the M lens so that when attached, the lens will become a telescope and where can I get one? Thanks and regards,

[bobtodrick]

I'm pretty sure no such thing exists. All the thing does is allow

you to view through the lens, with no further magnification. On a

180 R lens for example it is giving you approximately 4X

magnification (a 4 power monocular, so to speak). On a 90mm M lens

(probably the most common M telephoto in most peoples kit) it would

not even be giving you a full 2X, and even with the 135 it would be

about 2.5X. If you need the occcational closeup look at something

and space is at a premium, Pentax (for example) makes a nice 7X

monocular that is small, has good optics and is under $100.00 (much

less than the Leica attachment for their R lenses).

[richard_ilomaki3]

Tom;

I have the same thing for my Nikon lenses-very handy. They are no

longer in production but they are available for about $50 used and

with a lens like a Nikon 105 f2.5 you get great terrestrial viewing

as well as astronomical stuff with a good mount. To match that in a

ready made scope with a similar aperture, you would have to pay more.

 

<p>

 

It would be worth it to get one and a Nikon 105 just for that. I use

it with my 85 1.8 for wide field viewing of the sky- stuff like

Messier objects AKA the Andromeda nebula/galaxy.

 

<p>

 

The advantages/differences one would see using a M lens would

invariably be lost in the haze or ripples created by the air.

 

<p>

 

Cheers

[eliot]

Tom. There was a device called by the Leitz code OSBLO that attached

to the lens and converted it for telescopic viewing. It's a black

plastic thing with a lens in it, and could only be used with certain

lenses. I don't know which all lens, except that I know the 90/4.0

Elmar was suitable for use with the OSBLO. These things are not all

that common, but you can buy one from a dealer for about $ 75-100,

when you can find it.

[frank_horn]

Tom- The TO-R telescope ocular attachment (14 234) will convert R

lenses to a monocular. My understanding is, that you get 1x power

for each 12.5mm of focal length. That would make a Apo-Macro R 100mm

lens an 8x monocular. Since there is a way to use M lenses on R

cameras, with an adapter, I thought there might be a way to adapt 14

234 TO-Rs to M lenses, but two emails from Solms state that there

presently is no way to adapt M lenses to monocular, as the Rs can

be. I also would like such a device for M lenses.