TheGodParticle/Hari Posted May 28, 2016 Share #81 Posted May 28, 2016 Advertisement (gone after registration) FYI - http://petapixel.com/2016/05/26/sigma-preparing-release-85mm-f1-4-art-lens-report/ Sent from my iPhone using Tapatalk Link to post Share on other sites More sharing options...
Advertisement Posted May 28, 2016 Posted May 28, 2016 Hi TheGodParticle/Hari, Take a look here Autofocus Adapter Canon EF to Leica SL by Novoflex. I'm sure you'll find what you were looking for!
adli Posted May 28, 2016 Share #82 Posted May 28, 2016 If the upcoming R adapter supports auto diaphragm the aperture info will of course be available in the SL. The question is if auto diaphragm is doable, since it will involve a motor or similar in the adapter driving the diaphragm. In theory it should be doable, but at what cost? The R8/R9 knew about the aperture in use on their lenses via a mechanical link, the same used for stop down. They didn't need the ROM for that. The ROM, if used on the SL via the future R adapter, will only activate automatically the information already available in the R lenses list inside the SL. Exactly like the six bit from the L lenses are doing via the M adapter. This will be already an improvement IMO. Obviously I would like the adapter to also read the real aperture via the lever, and even better to stop it down automatically. But I would be very surprised if it happens. And very pleased. Link to post Share on other sites More sharing options...
Steve Spencer Posted May 28, 2016 Share #83 Posted May 28, 2016 For fans of auto aperture manual focus lenses, this adapter should also allow Zeiss lenses designed for the Canon mount to operate on the SL with auto aperture. You should be able to focus with the lens wide open and the adapter should automatically stop down to the aperture chosen using the camera. This is how Canon EF adapters work with Zeiss lenses on Sony E mount cameras. It will be interesting when people get the adapter if there is a depth of field preview button or something similar. Otherwise you will lose the ability for exposure preview at the taking aperture. All these capabilities are implemented in the EF adapters for Sony. Hopefully they will be in this adapter as well. Link to post Share on other sites More sharing options...
wildlightphoto Posted May 28, 2016 Share #84 Posted May 28, 2016 It will be interesting when people get the adapter if there is a depth of field preview button or something similar. Otherwise you will lose the ability for exposure preview at the taking aperture. All these capabilities are implemented in the EF adapters for Sony. Hopefully they will be in this adapter as well. The camera's exposure preview button ought to work. Link to post Share on other sites More sharing options...
Jeff S Posted May 28, 2016 Share #85 Posted May 28, 2016 Would be nice if the adapter maintained weather sealing when using Canon sealed lenses (I'm guessing not).....anyone know without my emailing Novoflex? Jeff Link to post Share on other sites More sharing options...
ramarren Posted May 28, 2016 Share #86 Posted May 28, 2016 Probably best to just email Novoflex, Jeff. They've been responsive when I've emailed them. For Leica's "R Adapter SL" (my made-up name ... ), an electronic interface to read the ROM doesn't help me at all. All but three of my lenses are 3-cam models, the most compatible across Leica R8 and Leicaflex SL... A mechanical interface to read the max and set aperture, and to provide auto-diaphragm operation, are the only things that would elevate the dedicated adapter to be better than the current two adapter stack (R Adapter M on M Adapter T) ... other than a larger diameter throat to remove vignetting with very long focal lengths. I get very little of that with the lens range that I have (15mm to 500mm when using the 2x teleconverter on the Telyt-R 250/4). I know the mechanical diaphragm actuation is a tricky thing to do and get right, but I hope it happens. It won't hurt much if it doesn't; I'm happy using these lenses with the two adapter stack already. It would just add more versatility to the SL with the existing (and excellent) R lenses. Link to post Share on other sites More sharing options...
steppenw0lf Posted May 30, 2016 Share #87 Posted May 30, 2016 Advertisement (gone after registration) Would be nice if the adapter maintained weather sealing when using Canon sealed lenses (I'm guessing not).....anyone know without my emailing Novoflex? Jeff Got a reply from Novoflex, yes, the adapter has a protective lip ("Dichtlippe" in german) like all other SL equipment. That means it is just as weatherproof as the SL 24-90. That's my translation . If you need the original english text you have to write to them in english. They are quick to reply. I wrote yesterday and had the answer this morning. Link to post Share on other sites More sharing options...
artur5 Posted May 30, 2016 Share #88 Posted May 30, 2016 Probably best to just email Novoflex, Jeff. They've been responsive when I've emailed them. For Leica's "R Adapter SL" (my made-up name ... ), an electronic interface to read the ROM doesn't help me at all. All but three of my lenses are 3-cam models, the most compatible across Leica R8 and Leicaflex SL... A mechanical interface to read the max and set aperture, and to provide auto-diaphragm operation, are the only things that would elevate the dedicated adapter to be better than the current two adapter stack (R Adapter M on M Adapter T) ... other than a larger diameter throat to remove vignetting with very long focal lengths. I get very little of that with the lens range that I have (15mm to 500mm when using the 2x teleconverter on the Telyt-R 250/4). I know the mechanical diaphragm actuation is a tricky thing to do and get right, but I hope it happens. It won't hurt much if it doesn't; I'm happy using these lenses with the two adapter stack already. It would just add more versatility to the SL with the existing (and excellent) R lenses. I wouldn't bet on the R-SL adapter having any kind of mechanical device for the lens iris. In fact, I'd confidently bet that it won't. For one thing, as you said this is tricky to do. It needs a sort of powered gear : stepped motor/electro magnet etc, to move a push.pull 'finger'. Possibly it would also need a button for DOF preview. All this must be stuffed inside the body of the adapter without interfering in the light path - that means a bulky, heavy and, most surely, awfully expensive device. What would be the advantages of such adapter with iris control ? of course focus with a full open lens and also shutter priority/program modes. Automatic iris is quite compulsory for cameras with OVFs in order to avoid dark viewfinders, blackened split image circles, etc..with an EVF this is not a problem. IMHO It would be much more interesting if Leica released an AF adapter, such as the Techart for M lenses to Sony A7 cameras. Of course, lenses longer than 50mm. or with internal focus do need a rough manual prefocus but, even so, that would be a most welcome feature. Anyway, knowing Leica a bit, I'm predicting that this adapter won't have neither automated iris nor AF. Link to post Share on other sites More sharing options...
rafikiphoto Posted May 30, 2016 Share #89 Posted May 30, 2016 I have an EOS mount Sigma 300mm f2.8 that I'd love to use on the SL. How likely is it that 3rd party lenses will be compatible with the adaptor? Andreas from Novoflex replied to my email: "We are just testing many lenses with the new adapter. Up to now, I tried 3 Sigma Lenses including the 150 - 600mm and all these lenses worked very well." Link to post Share on other sites More sharing options...
ramarren Posted May 30, 2016 Share #90 Posted May 30, 2016 ... IMHO It would be much more interesting if Leica released an AF adapter, such as the Techart for M lenses to Sony A7 cameras. Of course, lenses longer than 50mm. or with internal focus do need a rough manual prefocus but, even so, that would be a most welcome feature. .. I have absolutely no interest in autofocus adaptations like that. I have one Nikon made and find it just about completely useless ... I'd rather just use manual focus with my Nikkors and with my R lenses. The mechanical diaphragm control servo doesn't have to be very bulky or complicated, nor does it have to consume a lot of power. What makes it tricky is more a matter of integrating its operational timing with the camera's shutter mechanism, and the SL's shutter release to actual exposure lag is shorter than any SLR camera. R lenses were never designed to operate at 11fps so the adapter's servo will have to be smart to hold the iris at the taking aperture when the SL is in max continuous capture mode. Et cetera. The stop-down can be triggered by the Aperture or Exposure simulation modes, why would that need a dedicated button? It will be under camera control... The major benefits, in order of importance, would be extended metering range, improved manual focusing, accurate display of working lens opening in viewfinder and EXIF, and access to more than just A and M exposure modes with R lenses. The first benefit listed is the big one, to me: anything that improves the metering range and consistency of a camera is a plus. I hope for it, I'm not going to be upset if it doesn't surface. I want this far far more than AF adaptation of Nikon or Canon lenses, however. I didn't want the SL so I could re-purpose some other manufacturer's lenses... Link to post Share on other sites More sharing options...
Ivar B Posted May 31, 2016 Share #91 Posted May 31, 2016 As I understand it, the adapter does not support IS? I was thinking of getting a Canon 4/300mm L and the non IS lenses are quite a bit cheaper than the IS lens and some argue that they are also a little superior optically. If the adapter does not support IS there should be no need to buy an IS lens. Link to post Share on other sites More sharing options...
adli Posted May 31, 2016 Share #92 Posted May 31, 2016 All modern DSLR lenses have bulidt in diaphragm control controlled electronically by the camera. In the latest R cameras the stop- down is controlled electronically in the house and transfered mechanically to the lens. Buliding the control in the adapter instead of the camera is no hocus pocus, but it will need to be a bit powerfull in since there are more mechanical parts to be moved than in new newest Canikon lenses. As ramarren pointed out, the qestion is how fast it will operate and how expensive it will be. The mechanical diaphragm control servo doesn't have to be very bulky or complicated, nor does it have to consume a lot of power. What makes it tricky is more a matter of integrating its operational timing with the camera's shutter mechanism, and the SL's shutter release to actual exposure lag is shorter than any SLR camera. R lenses were never designed to operate at 11fps so the adapter's servo will have to be smart to hold the iris at the taking aperture when the SL is in max continuous capture mode. Et cetera. The stop-down can be triggered by the Aperture or Exposure simulation modes, why would that need a dedicated button? It will be under camera control... Link to post Share on other sites More sharing options...
pgk Posted May 31, 2016 Share #93 Posted May 31, 2016 .....the qestion is how fast it will operate and how expensive it will be. And how much power it will draw and where from. Link to post Share on other sites More sharing options...
ramarren Posted May 31, 2016 Share #94 Posted May 31, 2016 All modern DSLR lenses have bulidt in diaphragm control controlled electronically by the camera. In the latest R cameras the stop- down is controlled electronically in the house and transfered mechanically to the lens. Buliding the control in the adapter instead of the camera is no hocus pocus, but it will need to be a bit powerfull in since there are more mechanical parts to be moved than in new newest Canikon lenses. As ramarren pointed out, the qestion is how fast it will operate and how expensive it will be. Nikon's aperture actuator is mechanical, as is Pentax', to the most current lens series as far as I'm aware. Link to post Share on other sites More sharing options...
wildlightphoto Posted May 31, 2016 Share #95 Posted May 31, 2016 Nikon's aperture actuator is mechanical, as is Pentax', to the most current lens series as far as I'm aware. The latest Nikon E-type AF lenses have electronic control i.e., the 300mm f/4E PF ED VR Link to post Share on other sites More sharing options...
ramarren Posted May 31, 2016 Share #96 Posted May 31, 2016 The latest Nikon E-type AF lenses have electronic control i.e., the 300mm f/4E PF ED VR Hmm. I'll have to check my most recently purchased AF 50, the f/1.8 model. Far as I recall it was still a mechanical actuator. The longest Nikon lens I have is a Nikon 180/2.8AF-D which is also mechanical... And I know that one is a few years old. I know little of the longer lenses, I've only ever owned one Nikkor 300/4 from the pre-AI era. Ah, I see information on the E-type lens series at http://www.nikonusa.com/en/learn-and-explore/article/go35b5yp/which-nikkor-lens-type-is-right-for-your-dslr.html . Evidently, there aren't too many of these lenses available as yet ... six total, only two in the focal length range that I might be looking for (sub 300mm). They're compatible with my D750 only, not the F6 nor the F, so I'll likely never own one. Link to post Share on other sites More sharing options...
wildlightphoto Posted May 31, 2016 Share #97 Posted May 31, 2016 Hmm. I'll have to check my most recently purchased AF 50, the f/1.8 model. Far as I recall it was still a mechanical actuator. The longest Nikon lens I have is a Nikon 180/2.8AF-D which is also mechanical... And I know that one is a few years old. I know little of the longer lenses, I've only ever owned one Nikkor 300/4 from the pre-AI era. The most recent AF Nikkor 50mm f/1.8 is a G type, no aperture ring with mechanical actuation. E type lenses have no aperture ring and electronic actuation. These include the current 300mm f/4E PF ED VR, 200-500mm f/5.6E ED VR, 400mm f/2.8E FL ED VR, 500mm f/4E FL ED VR, and 600mm f/4E FL ED VR. Link to post Share on other sites More sharing options...
ramarren Posted May 31, 2016 Share #98 Posted May 31, 2016 The most recent AF Nikkor 50mm f/1.8 is a G type, no aperture ring with mechanical actuation. E type lenses have no aperture ring and electronic actuation. These include the current 300mm f/4E PF ED VR, 200-500mm f/5.6E ED VR, 400mm f/2.8E FL ED VR, 500mm f/4E FL ED VR, and 600mm f/4E FL ED VR. As above, few and far between, and mostly in the longer focal lengths. I think that means there are seven of these lenses, I think I counted two shorter zooms. Anyway, the point is made that Nikon is switching over to this electronic actuation system in their latest offerings. However, the VAST majority of Nikon lenses (including most if not all of the current series lenses) have mechanical iris actuation. Now, about that R Adapter SL mount... Link to post Share on other sites More sharing options...
adli Posted June 1, 2016 Share #99 Posted June 1, 2016 My point was that an R adapter SL with bulidt in actuator controlled electronically by the SL is highly feasable. As above, few and far between, and mostly in the longer focal lengths. I think that means there are seven of these lenses, I think I counted two shorter zooms. Anyway, the point is made that Nikon is switching over to this electronic actuation system in their latest offerings. However, the VAST majority of Nikon lenses (including most if not all of the current series lenses) have mechanical iris actuation. Now, about that R Adapter SL mount... Link to post Share on other sites More sharing options...
dkCambridgeshire Posted June 2, 2016 Share #100 Posted June 2, 2016 Might/could/would Novoflex be responsible for the promised R adapter L due for release at Photokina? dunk Link to post Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.