farnz Posted September 5, 2012 Author Share #21 Â Posted September 5, 2012 Advertisement (gone after registration) What would be the sense in my spending money to buy a new longer lens when I already have a 100/2.8 APO-Macro and two 2x APO extenders that will achieve the same objective? Â Pete. Link to post Share on other sites More sharing options...
Advertisement Posted September 5, 2012 Posted September 5, 2012 Hi farnz, Take a look here Stacking 2x APO extenders?. I'm sure you'll find what you were looking for!
jaapv Posted September 5, 2012 Share #22 Â Posted September 5, 2012 You lose a lot of light... f 11 and probably need to close one stop for quality - f16. Link to post Share on other sites More sharing options...
farnz Posted September 5, 2012 Author Share #23 Â Posted September 5, 2012 True but for me that doesn't by itself justify another lens when I'll be using a tripod anyway. Once I've had a look at the results I'll decide whether the loss in quality justifies investing in another lens. Â Pete. Link to post Share on other sites More sharing options...
wildlightphoto Posted September 5, 2012 Share #24 Â Posted September 5, 2012 What would be the sense in my spending money to buy a new longer lens when I already have a 100/2.8 APO-Macro and two 2x APO extenders that will achieve the same objective? Â 'Same objective' needs to be qualified. If focal length and working distance are all that matter then it certainly would meet the objective. Handling, image quality and ability to focus accurately (due to viewfinder darkening) may not be the same. OTOH if you already have two 2x APO extenders give it a try and tell us how it works out for you. Â What I found when stacking the 1.4x and 2x APO extenders with the 280mm f/4 APO is that the focussing ring became much too sensetive to fine-focus and the out-of-focus image was so blurred that I couldn't tell if the lens was pointed toward the subject. Link to post Share on other sites More sharing options...
Larcomb Posted September 6, 2012 Share #25  Posted September 6, 2012 What would be the sense in my spending money to buy a new longer lens when I already have a 100/2.8 APO-Macro and two 2x APO extenders that will achieve the same objective? Pete.  The APO doubles are not cheap, and the loss of light is substantial given that you have to stop down a couple of stops anyway. It really does not make a lot of sense to do this. Link to post Share on other sites More sharing options...
k-hawinkler Posted September 6, 2012 Share #26 Â Posted September 6, 2012 The APO doubles are not cheap, and the loss of light is substantial given that you have to stop down a couple of stops anyway. It really does not make a lot of sense to do this. Â Â Why not? He already has the equipment. So, it's a matter of trying out if additional equipment is warranted in the OP's mind. Link to post Share on other sites More sharing options...
Larcomb Posted September 6, 2012 Share #27 Â Posted September 6, 2012 Advertisement (gone after registration) Why not? He already has the equipment. So, it's a matter of trying out if additional equipment is warranted in the OP's mind. Â The question was brought up and the answers are given. There are several good reasons that the results will be inferior to using a longer lens. Â Each doubles loses 2 stops, so 4 stops would be lost, and the lens should be stopped down at least 2 stops to begin with, so thats 6 stops. Link to post Share on other sites More sharing options...
farnz Posted September 6, 2012 Author Share #28 Â Posted September 6, 2012 The APO doubles are not cheap, and the loss of light is substantial given that you have to stop down a couple of stops anyway. It really does not make a lot of sense to do this. Larcomb, Â In actual fact I managed to find a second APO 2x extender very cheaply, which is what prompted my original question. In answer to my original question it sounds like you haven't tried it but you think it would degrade the image unacceptably. Thank you for kindly giving your opinion. Â Pete. Link to post Share on other sites More sharing options...
Larcomb Posted September 6, 2012 Share #29  Posted September 6, 2012 Larcomb, In actual fact I managed to find a second APO 2x extender very cheaply, which is what prompted my original question. In answer to my original question it sounds like you haven't tried it but you think it would degrade the image unacceptably. Thank you for kindly giving your opinion.  Pete.  You will get better overall results with a longer lens. Link to post Share on other sites More sharing options...
k-hawinkler Posted September 6, 2012 Share #30 Â Posted September 6, 2012 You will get better overall results with a longer lens. Â Â That's probably true for many cases. Â Here is an interesting link though: Â http://www.l-camera-forum.com/leica-forum/leica-m8-forum/187110-infinite-possibilities-m8-9-apo-extender.html#post1738367 Link to post Share on other sites More sharing options...
k-hawinkler Posted September 6, 2012 Share #31  Posted September 6, 2012 So, I quickly coupled together the following pieces: NEX-7 + E-R Adapter + APO-Extender-R 2x + 14127 + 16464 + Tele-Elmar 1:4/135 lens head, displayed at the bottom and compared it with: M9 + Visoflex III + Televit + Telyt-V 1:5.6/400, displayed at the top of the next image.  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!   This shot was taken with NEX-7 + E-R Adapter + APO-Extender-R 2x + 14127 + 16464 + Tele-Elmar 1:4/135 lens head, 100% crop   This one with M9 + Visoflex III + Televit + Telyt-V 1:5.6/400, 100% crop  The light was better in the last picture.  My take: Different advantages and disadvantages for both systems - but certainly good enough to get started with a project. Link to post Share on other sites Simply register for free here – We are always happy to welcome new members!   This shot was taken with NEX-7 + E-R Adapter + APO-Extender-R 2x + 14127 + 16464 + Tele-Elmar 1:4/135 lens head, 100% crop   This one with M9 + Visoflex III + Televit + Telyt-V 1:5.6/400, 100% crop  The light was better in the last picture.  My take: Different advantages and disadvantages for both systems - but certainly good enough to get started with a project. ' data-webShareUrl='https://www.l-camera-forum.com/topic/187251-stacking-2x-apo-extenders/?do=findComment&comment=2106908'>More sharing options...
k-hawinkler Posted September 7, 2012 Share #32  Posted September 7, 2012 This one is better focused, NEX-7 + Telyt-V 1:5.6/560 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=2106965'>More sharing options...
Michael Geschlecht Posted September 7, 2012 Share #33 Â Posted September 7, 2012 Hello Everybody, Â 1 advantage of a Bellows II or a Bellows R w/ a detached lens head is that along w/ the focussing bellows comes a focussing RACK. A relatively small, compact, versatile package. Â Because the distances involved preclude either of the above w/ the 100/2.8 perhaps a focussing rack like a Novoflex Castel-Cross might help. Â It is often easier to pick a plane of focus when that plane is wafer thin if you: Move everything together rather than try to individually change focus, adjust & recompose all @ the same time. Â It would also give you a more secure way to attach the entire rigamarole to a tripod. Â It is not unusual to use more than 1 tripod/support when doing long distance or closeup photography for reduction of vibrations, etc within a system even if additional support is not needed to mechanically hold the set-up. Â Best Regards, Â Michael Link to post Share on other sites More sharing options...
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