farnz Posted September 4, 2012 Share #1 Posted September 4, 2012 Advertisement (gone after registration) I have a 2x APO extender that I use to turn my 100/2.8 APO-Macro-Elmarit-R into a 200/5.6 (macro) lens. Would stacking a second 2x APO extender to turn it into a 400/11 degrade the image quality unacceptably? I recognise that diffusion will have some effect owing to the small aperture but should I expect degradation beyond that? Has anyone tried this? Pete. Link to post Share on other sites More sharing options...
Advertisement Posted September 4, 2012 Posted September 4, 2012 Hi farnz, Take a look here Stacking 2x APO extenders?. I'm sure you'll find what you were looking for!
anabasis Posted September 5, 2012 Share #2 Posted September 5, 2012 I haven't tried, but I would think stacking 2x TC's, even good ones like the APO would degrade the image. Focusing at F11 won't be any fun either. JCA Link to post Share on other sites More sharing options...
wildlightphoto Posted September 5, 2012 Share #3 Posted September 5, 2012 I have a 2x APO extender that I use to turn my 100/2.8 APO-Macro-Elmarit-R into a 200/5.6 (macro) lens. Would stacking a second 2x APO extender to turn it into a 400/11 degrade the image quality unacceptably? I haven't tried stacking the extenders but in controlled tests I found that the 2x APO extender slightly degrades the image quality of the 280mm f/4 APO so I expect that another extender will degrade the image quality a little more. Whether it's unacceptable or not is up to you. Link to post Share on other sites More sharing options...
mmradman Posted September 5, 2012 Share #4 Posted September 5, 2012 I have seen application of multiple TC on other forums with passable results so yes it would be possible. Never tried APO 2xTC but with APO 1.4xTC you will need to fit extension tube between TC to achieve clearance between front of 1.4TC and component attached to the front, I say this as TC are not designed for stacking so extra care would be advisable. The way I see it most difficult part will be achieving acceptable sharpness due to slow/ish shutter speed, most probably you would need to use tripod. To attach overall combination, LENS+2xTC+CAMERA, to the tripod without over stressing camera tripod socket (irrespective of the camera make/model) you would have to devise a tubular clamp with tripod foot attached to one of TC for good balance. Link to post Share on other sites More sharing options...
k-hawinkler Posted September 5, 2012 Share #5 Posted September 5, 2012 I have tried various things. The more stacking the more degradation. I stopped at 2x+2x+2x+1.4x. http://forums.dpreview.com/forums/readflat.asp?forum=1038&message=40500932 http://www.l-camera-forum.com/leica-forum/landscape-travel/220600-santa-fe-ski-area.html 500px / Photo "Communication Tower Top" by Karl-Heinz A Winkler 2012-02-10 DomePeak Turbulence - winklers' Photos 2012-02-10 DomePeak Turbulence - winklers' Photos http://forums.dpreview.com/forums/readflat.asp?forum=1038&message=40445492 Link to post Share on other sites More sharing options...
farnz Posted September 5, 2012 Author Share #6 Posted September 5, 2012 Thanks to all who have replied. I would use a tripod as initially I intend to shoot macro so I think I'll give it a go based on K-H's experience and examples. Pete. Link to post Share on other sites More sharing options...
wildlightphoto Posted September 5, 2012 Share #7 Posted September 5, 2012 Advertisement (gone after registration) Thanks to all who have replied. I would use a tripod as initially I intend to shoot macro so I think I'll give it a go based on K-H's experience and examples. Pete. Be careful with this combination on a tripod if the camera is an R4, R5, R-E, R6.x or R7. The tripod socket on these bodies will break if over-stressed and the repair involves throwing the broken body away and buying another. I'd suggest using a tripod ring on the lens or on one of the extenders. Link to post Share on other sites More sharing options...
jaapv Posted September 5, 2012 Share #8 Posted September 5, 2012 In a far past I did stack the 1.4x on the 2x apo for bird shots. I found the results excellent. Link to post Share on other sites More sharing options...
farnz Posted September 5, 2012 Author Share #9 Posted September 5, 2012 Be careful with this combination on a tripod if the camera is an R4, R5, R-E, R6.x or R7. The tripod socket on these bodies will break if over-stressed and the repair involves throwing the broken body away and buying another. I'd suggest using a tripod ring on the lens or on one of the extenders. Doug, Many thanks for your warning. I will be using a digital camera (but alas I haven't managed to find a DMR-R8 combination for the right price) so I'm making do with a Canon 5D mkII and Cameraquest brass adaptor. I've hung the 80-200/4 Vario-Elmar-R and 2x APO extender off it without any negative reaction so I assumed I'd be okay with 2x APO + 2x APO + 100/28. APO-Macro-Elmarit-R. What do you think please? Pete. Link to post Share on other sites More sharing options...
Larcomb Posted September 5, 2012 Share #10 Posted September 5, 2012 It makes more sense to get a longer lens (or two) such as 180mm, 250mm, 280mm, 350mm or 400mm lenses. Some of these are quite inexpensive on the used market. Link to post Share on other sites More sharing options...
wildlightphoto Posted September 5, 2012 Share #11 Posted September 5, 2012 Doug, Many thanks for your warning. I will be using a digital camera (but alas I haven't managed to find a DMR-R8 combination for the right price) so I'm making do with a Canon 5D mkII and Cameraquest brass adaptor. I've hung the 80-200/4 Vario-Elmar-R and 2x APO extender off it without any negative reaction so I assumed I'd be okay with 2x APO + 2x APO + 100/28. APO-Macro-Elmarit-R. What do you think please? Pete. No experience with 5D mkII Link to post Share on other sites More sharing options...
farnz Posted September 5, 2012 Author Share #12 Posted September 5, 2012 It makes more sense to get a longer lens (or two) such as 180mm, 250mm, 280mm, 350mm or 400mm lenses. Some of these are quite inexpensive on the used market. Thanks for your suggestion. Regrettably nothing touches the 100/2.8 APO-Macro-Elmarit-R for macro work. Pete. Link to post Share on other sites More sharing options...
mmradman Posted September 5, 2012 Share #13 Posted September 5, 2012 Thanks for your suggestion. Regrettably nothing touches the 100/2.8 APO-Macro-Elmarit-R for macro work. Pete. Get closer. Link to post Share on other sites More sharing options...
masjah Posted September 5, 2012 Share #14 Posted September 5, 2012 Pete, just a note of caution. In the instruction leaflet for the 2X Apo Extender, Leica say: "The APO-EXTENDER-R 2X can also be used with the LEICA macro lenses in the close-up range. In combination with the MACRO-ELMARIT-R 60mm f/2.8 and the APO-MACRO-ELMARIT-R 100mm f/2.8, a reproduction ratio of 1:1 can be achieved. However, flat originals (e.g.stamps) cannot be reproduced without distortion. [My italics.]" Presumably, since you've already been using one extender with the 100/2.8, you've not found this to be too much of a problem, but it may well be that, if you stack two together, you might have some problems with field curvature. I can't speak from direct experience though, because I tend to use the dedicated Elpro for my 100/2.8, rather than my APO-EXTENDER. Link to post Share on other sites More sharing options...
Larcomb Posted September 5, 2012 Share #15 Posted September 5, 2012 Thanks for your suggestion. Regrettably nothing touches the 100/2.8 APO-Macro-Elmarit-R for macro work. Pete. It is not clear: why do you need longer lenses if you are doing macro work? Link to post Share on other sites More sharing options...
farnz Posted September 5, 2012 Author Share #16 Posted September 5, 2012 Thanks, John, and I'd actually noticed that on Saturday in the accompanying booklet and considered that this was advice more for reprographic photography. I suppose any latent field curvature will double or possibly even follow the square-law. Pete. Link to post Share on other sites More sharing options...
farnz Posted September 5, 2012 Author Share #17 Posted September 5, 2012 It is not clear: why do you need longer lenses if you are doing macro work? To be able to get 'closer' to nervous subjects without getting physically nearer to them and risk disturbing them. At this stage I'm experimenting. Pete. Link to post Share on other sites More sharing options...
jaapv Posted September 5, 2012 Share #18 Posted September 5, 2012 Precisely. This was taken using a 400 mm on the M8. 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/187251-stacking-2x-apo-extenders/?do=findComment&comment=2106022'>More sharing options...
wildlightphoto Posted September 5, 2012 Share #19 Posted September 5, 2012 Precisely. This was taken using a 400 mm on the M8. Pit vipers also come to mind. Link to post Share on other sites More sharing options...
Larcomb Posted September 5, 2012 Share #20 Posted September 5, 2012 Pit vipers also come to mind. But long lesnes are for that purpose. Several have close-up spacers etc. Link to post Share on other sites More sharing options...
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