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Tell your friends about us!Ricoh GXR Leica M mount!!!
- Thread starter becauseitsnice
- Start date
odklizec
PK
Hi Robmius and welcome here! Willo is correct. The GXR should be able to calculate the exposure/shutter speed just fine and it should work the same with all M mount lenses, not just the Leica lenses. The question is, if the GXR M mount will recognize Leica lens coding and if there will be an interface to manually set the lens aperture/focal length to be saved in EXIF?
Just one important thing. Don't forget that your favorite 35mm lens will turn to 52mm! The M mount module will be equipped with ASPC sensor with crop factor 1.5 (the same as already used in A12 modules).
Just one important thing. Don't forget that your favorite 35mm lens will turn to 52mm! The M mount module will be equipped with ASPC sensor with crop factor 1.5 (the same as already used in A12 modules).
Tom Caldwell
New Member
Yep same for all lenses with an apaerture ring. In aperture priority you set the aperture on the lens and the camera calculates and sets the shutter speed. In manual mode you set the aperture on the lens and the shutter via the camera body. Works well.
Getting focus right is the hardest part. On many dlsr cameras phase detect focus brings up a focus confirm light (Pentax at least). Canon EOS can be tricked into doing it with a set of contacts on the adapter known as a "dandelion". Evil cameras to date have relied on contrast detect focus which does not work with manual lenses. Therefore so far these cameras have relied on magnifying the screen to do this. Samsung offers only a 2x magnification on it's NX which is usually enough. Panasonic goes further than this and has greater screen magnification capability as does Ricoh in the GXR back but the resolution of Ricoh's magnified screen has been panned for some reason. If is not great imho but then I have not seen the Panasonic screen to compare how much better it might be. The Ricoh lcd has to be the highest resolution on the market and better than Olympus at least if not Panasonic as well - something is missing here and I guess it can be worked out by someone who knows the cameras better.
A recent image of an M mount module on camera being bandied about looks like a late pre-production model looking very finished and up-market. Cavernous inside it should fit the biogon type lenses but there is no real sign of an external sensor to work external phase detect focus not to say that Ricoh have not found a way to place it inside the body. Phase detect confirm focus indicator would make intelligent use of a manual focus lens quite quick and workable in skilled hands.
Rangefinder mount biogon type lenses will not fit inside any other EVIL type camera as they are designed peimarily to house their own modern fully automatic type lenses and the electrical contacts and molded inner shape get in the way. This rules out many quite nice wide angle lenses that have a rear protrusion of more than 9mm (Samsung NX).
The Jupiter-9 (85mm) for instance still fits but at infinity focus shorts out the electrical contacts of the Samsung NX10. Others simply will not screw into place.
Getting focus right is the hardest part. On many dlsr cameras phase detect focus brings up a focus confirm light (Pentax at least). Canon EOS can be tricked into doing it with a set of contacts on the adapter known as a "dandelion". Evil cameras to date have relied on contrast detect focus which does not work with manual lenses. Therefore so far these cameras have relied on magnifying the screen to do this. Samsung offers only a 2x magnification on it's NX which is usually enough. Panasonic goes further than this and has greater screen magnification capability as does Ricoh in the GXR back but the resolution of Ricoh's magnified screen has been panned for some reason. If is not great imho but then I have not seen the Panasonic screen to compare how much better it might be. The Ricoh lcd has to be the highest resolution on the market and better than Olympus at least if not Panasonic as well - something is missing here and I guess it can be worked out by someone who knows the cameras better.
A recent image of an M mount module on camera being bandied about looks like a late pre-production model looking very finished and up-market. Cavernous inside it should fit the biogon type lenses but there is no real sign of an external sensor to work external phase detect focus not to say that Ricoh have not found a way to place it inside the body. Phase detect confirm focus indicator would make intelligent use of a manual focus lens quite quick and workable in skilled hands.
Rangefinder mount biogon type lenses will not fit inside any other EVIL type camera as they are designed peimarily to house their own modern fully automatic type lenses and the electrical contacts and molded inner shape get in the way. This rules out many quite nice wide angle lenses that have a rear protrusion of more than 9mm (Samsung NX).
The Jupiter-9 (85mm) for instance still fits but at infinity focus shorts out the electrical contacts of the Samsung NX10. Others simply will not screw into place.
I bought my GXR primarily because of the M module. I am surprised how few people seem to want to use Leica lenses with this mount. They don't have to be expensive and certainly not more the the A12 lenses. Below is a jpg scan I took recently (from a bog standard Jessops develop and print) of a pod on the London Eye with a Leica 135mm f4 lens that cost me £200 and was in immaculate condition. The most expensive Leica lens I have is my 50mm f2 which was £600, then a Zeiss 35mm f2.8 costing £450 - all from Ebay and all fabulous lenses. It will be really interesting to see how the Zeiss 35mm compares to the A12 33mm. I am really looking forward to seeing how the 50mm (75mm) and 135mm (200mm) will handle on the GXR which I love working with.
Attachments
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EXIFpod135mm.jpg
odklizec
PK
Now I'm really curious what kind of manual focus assistance is implemented? From the images it seems as if the M mount is still capable of Live View (judging from the attached EVF)? This is in contrast from what we read some time ago? So I really hope they added something better than just resized center of screen, which is not very comfortable to use even with current AF modules.
kanzlr
New Member
yep, the resized center is a horror for accurate focusing...If this doesn't work out there will be a big pile of GXR stuff (mine) in the for sale area of this forum... :|
The resized center would be more useful in 1:1 mode, but the smallest is 2x...so it is hard to see if it is sharp, you just see if it gets better or worse when you turn the lens ring...oh my.
The resized center would be more useful in 1:1 mode, but the smallest is 2x...so it is hard to see if it is sharp, you just see if it gets better or worse when you turn the lens ring...oh my.
odklizec
PK
It contains focal-plane shutter mechanism. Unlike the A12 modules equipped with the leaf shutter, the M mount module utilizes a completely new focal-plane shutter, which makes the body a bit bulkier on the left side. And I guess, it will be also a bit louder than the A12 shutter. I'm curious about the maximum shutter speed allowed with the M mount? The M8 (with similar focal plane shutter) initially allowed 1/8000, but it was very loud, so Leica engineers designed much more silent shutter at a cost of reduced shutter speed to 1/4000. As for me, 1/4000 would be just greatkanzlr":dwdcsnzk said:
