bono0272 Posted July 9, 2006 Share #1 Posted July 9, 2006 Advertisement (gone after registration) I understand that if a 3-cam lens is used with the DMR, the focal length of the lens will not be recorded in the EXIF. How about a ROM lens? With the contacts on the ROM lens, will the focal length of the lens being recorded and retrieved when viewing the photo in the computer? Link to post Share on other sites More sharing options...
Advertisement Posted July 9, 2006 Posted July 9, 2006 Hi bono0272, Take a look here EXIF information on DMR. I'm sure you'll find what you were looking for!
starwatcher Posted July 9, 2006 Share #2 Posted July 9, 2006 Richard, definitely YES... best - Klaus Link to post Share on other sites More sharing options...
albertknappmd Posted July 9, 2006 Share #3 Posted July 9, 2006 that is the purpose of the ROM. It is very helpful as everything you might possibly need is duely recorded. Link to post Share on other sites More sharing options...
adan Posted July 9, 2006 Share #4 Posted July 9, 2006 ...Although I shot a whole bunch of shots with a DMR/R9 and ROM lenses (15mm, 90mm, 180mm, 19mm) recently at a demo shoot - and the EXIF for all the shots (RAW and jpeg) lists the focal length as "0 [zero]mm" ???? Link to post Share on other sites More sharing options...
bono0272 Posted July 10, 2006 Author Share #5 Posted July 10, 2006 So do I. I am using a R8 with a DMR. My only ROM lens is the 180mm APO F2.8. I've checked the contacts between my lens and the camera body and they look perfectly match. However I can't find any information about the focal length of my ROM lens, it still records 0 mm in the EXIF. Same case as adan described. Link to post Share on other sites More sharing options...
psquared Posted July 10, 2006 Share #6 Posted July 10, 2006 The DMR should be recording the focal length in the EXIF if a ROM lens is mounted. The only exceptions are the zoom lenses, whose focal lengths do not get recorded. This is a known bug, which should be fixed. It's obvious that the DMR gets the information, because the lens information is displayed on playback on the DMR, yet it gets lost in the EXIF. Link to post Share on other sites More sharing options...
bono0272 Posted July 10, 2006 Author Share #7 Posted July 10, 2006 Advertisement (gone after registration) So how many DMR users with ROM lens are not retrieving the lens focal length in the EXIF? Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted July 10, 2006 Share #8 Posted July 10, 2006 21-35, 35-70 2.8 , 28-90 . Just the zooms, not sure about others but I had these three at one time or another and they do not show the focal length Link to post Share on other sites More sharing options...
bono0272 Posted July 10, 2006 Author Share #9 Posted July 10, 2006 Does Leica officially say the ROM lens (say, prime lens but not zoom lens) information will be recorded in the EXIF when using a DMR? I can't find such information in my DMR user manual. Link to post Share on other sites More sharing options...
gautier Posted April 18, 2012 Share #10 Posted April 18, 2012 I reply to this old message because I'm searching info about zooms and EXIF on a DMR. I write a Perl script to add the lens' name in the DNG. It's allow Lightroom to display the full name (see here or below for an example). Of course, it works only if the lens used has ROM contacts. Moreover, it's not possible to chose the right lens in some case (example: is a 180 mm f/2,8 an Elmarit or an Apo-Elmarit ?), but I can display a choice. I have no zoom to test and I haven't found any example with a focal in the EXIF. It's certainly due to the bug reported by squared. Do you know if this bug still exist ? The user guide explains only how the focal is displayed. In my french version, I can read "Dans le cas d’objectifs de zoom dotés d’un équipement ROM, ce réglage s’effectue par paliers. Dans le cas du Vario-Elmar-R 4/80–200, toutefois, jusqu’à 180mm au maximum. Dans deux cas (Apo-Vario-Elmarit-R 2,8/70–180 et Vario-Elmar-R 4,2/105–280), seule la focale de départ est affichée." [On zoom lenses equipped with ROM, this adjustment is carried out by steps. However, only up to 180 mm for the Vario-Elmar-R 4/80–200. And in two cases (Apo-Vario-Elmarit-R 2,8/70–180 and Vario-Elmar-R 4,2/105–280), only the shortest focal is displayed]. But in the english version, I read "On zoom lenses equipped with ROM, the information displayed is the respective shortest and longest focal lengths.". Not clear for me. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/1224-exif-information-on-dmr/?do=findComment&comment=1986585'>More sharing options...
stuny Posted April 18, 2012 Share #11 Posted April 18, 2012 Here's the EXIF data on my DMR/R8 with 80-200 and APO 2X. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/1224-exif-information-on-dmr/?do=findComment&comment=1986716'>More sharing options...
andybarton Posted April 18, 2012 Share #12 Posted April 18, 2012 A 2x converter probably doesn't have a ROM chip. Even if it did, it would need to be a "pass through" ROM that takes the data from a ROM'd lens, then adds "x2" to the appropriate data, before passing to the camera. Is that zoom ROM'd, Stuart? Link to post Share on other sites More sharing options...
masjah Posted April 18, 2012 Share #13 Posted April 18, 2012 A 2x converter probably doesn't have a ROM chip. Even if it did, it would need to be a "pass through" ROM that takes the data from a ROM'd lens, then adds "x2" to the appropriate data, before passing to the camera. Is that zoom ROM'd, Stuart? The Apo ROM version of the 2X converter certainly has a simple microprocessor as its ROM chip, and passes through "true" corrected versions of lens aperture to the camera, so possibly it might well do the same for focal length. I'll see if I can try it with a Metz flash to see how it zooms. EDIT: Yes it does. When I mount the 2X apo ROM convertor and the 50/2 Summicron to my camera, with Metz 54 MZ, the aperture on the flash and camera is shown as f/4 when the lens is set to f/2, and the flash zooms to 85mm, not 50mm (85mm being the nearest flash zoom position for a notional 100mm lens). Link to post Share on other sites More sharing options...
gautier Posted April 18, 2012 Share #14 Posted April 18, 2012 The Apo ROM version of the 2X converter certainly has a simple microprocessor as its ROM chip, and passes through "true" corrected versions of lens paerture to the camera, so possibly it might well do the same for focal length. I'll see if I can try it with a Metz flash to see how it zooms.I have a Apo-Extender-R 2x with ROM. With my lenses, the focal is well written in the EXIF (x2). The max aperture stays to the original one. So, my Perl script can detect several usages of this extender. For example, if I found a focal of 200 mm with a max aperture of f/2,8, I can conclude that the lens used is a "Leica Apo-Macro-Elmarit-R 100 mm f/2,8 + Apo-Extender-R 2x" Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/1224-exif-information-on-dmr/?do=findComment&comment=1986825'>More sharing options...
andybarton Posted April 18, 2012 Share #15 Posted April 18, 2012 Thanks for sorting that out for me, guys Link to post Share on other sites More sharing options...
gautier Posted April 18, 2012 Share #16 Posted April 18, 2012 Stuny, do you have some files taken with your Vario-Elmar without the extender ? The system works fine for my Module set : see attachment Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/1224-exif-information-on-dmr/?do=findComment&comment=1986857'>More sharing options...
graeme_clarke Posted April 18, 2012 Share #17 Posted April 18, 2012 My R9/DMR shows the focal length, aperture and shutter speed for the 100, 180 and 280mm lenses I have. For the 21-35 and 28-90 it doesn't give any lens data. Graeme Link to post Share on other sites More sharing options...
stuny Posted April 19, 2012 Share #18 Posted April 19, 2012 Here's the EXIF from my DMR/R8 with 80-200 ROM lens (no 2X APO RIOm adapter), shot last November. Everything except focal length shows in the EXIF. Perhaps this is the case when using an R8 and a zoom. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/1224-exif-information-on-dmr/?do=findComment&comment=1987754'>More sharing options...
andybarton Posted April 19, 2012 Share #19 Posted April 19, 2012 It could be that the ROM chip doesn't recognise the focal length on zooms. Link to post Share on other sites More sharing options...
masjah Posted April 19, 2012 Share #20 Posted April 19, 2012 It could be that the ROM chip doesn't recognise the focal length on zooms. Andy, on my 28-90 zoonm, my Metz 54MZ flashgun zooms its head as I zoom my lens - so information about the focal length set on the lens is being sent to the camera via the ROM chip. Link to post Share on other sites More sharing options...
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