colinbm Posted September 27, 2022 Share Posted September 27, 2022 I have bought a Canon MP-E 65mm f/2.8 1x-5x Macro Photo Lens & it works beautifully on my Sigma fp with a Canon EF - L mount adapter. It is a strange lens in that it has no focus ring, but the Aperture is automatic. To focus on the subject I have set-up a macro rail, which allows the camera or subject to be moved into focus. At 1:1 the DOF is 3mm max, so focus stacking is used for deeper subjects. Did I say it is a nice lens ? Here I have used one of my pet fluorescent rocks from Puttapa Zinc Mine, in South Australia, To show it full size in the cameras frame in visible light, UVA365nm light & UVC250nm light, to capture the visible fluorescence, ie UVIVF. The light sources are filtered for their UV band & the camera is an unconverted Sigma fp. Visible light..... UVA 365nm light induced visible fluorescence.... UVC 250nm light induced visible fluorescence.... Link to comment
Adrian Posted September 27, 2022 Share Posted September 27, 2022 The UVC version is brilliant! Yes the MP 65 is a great ens, though does need some practice! Link to comment
dabateman Posted September 27, 2022 Share Posted September 27, 2022 Yes a fun lens. But doesn't transmit much UV. Best for fluorescence. Great fluorescence images Colin. Link to comment
Kai Posted September 27, 2022 Share Posted September 27, 2022 I love this lens too. It perfectly closes the gap between classic macros and the microscope. And at a very high level! Have fun with it, Colin :) Link to comment
Nate Posted September 27, 2022 Share Posted September 27, 2022 Very cool looking Fluorescence. Does that lens not work with a helicoid? Link to comment
ulf Posted September 27, 2022 Share Posted September 27, 2022 It is a very special lens for 1x - 5x only. It is not possible to use/abuse for less magnification. It has a front lens group and a rear lens group that are separating when increasing the magnification. At such big magnifications focussing is best done by moving the motif or camera+lens. Link to comment
dabateman Posted September 27, 2022 Share Posted September 27, 2022 55 minutes ago, ulf said: It is a very special lens for 1x - 5x only. It is not possible to use/abuse for less magnification. It has a front lens group and a rear lens group that are separating when increasing the magnification. At such big magnifications focussing is best done by moving the motif or camera+lens. However it can be used with either a Metabones speed booster or a 1.4x telephoto adapter on a m43rds camera. Link to comment
colinbm Posted September 28, 2022 Author Share Posted September 28, 2022 Thanks everyone for looking & your comments. Link to comment
Ming Posted September 28, 2022 Share Posted September 28, 2022 Fluorescence from UVC is awesome. Link to comment
JMC Posted September 28, 2022 Share Posted September 28, 2022 That's a great lens Colin, and wonderful fluorescence images. The 254nm one is amazing. Link to comment
colinbm Posted September 29, 2022 Author Share Posted September 29, 2022 Thanks Ming @JMC Thanks, this is with a 250nm LED light. Link to comment
JMC Posted September 29, 2022 Share Posted September 29, 2022 5 hours ago, colinbm said: Thanks Ming @JMC Thanks, this is with a 250nm LED light. Oh, right, very nice for LED lighting at 250nm then. Link to comment
colinbm Posted September 29, 2022 Author Share Posted September 29, 2022 6 hours ago, JMC said: Oh, right, very nice for LED lighting at 250nm then. Sorry Jonathan but I had a senior moment & the LED light is 255nm. Link to comment
lukaszgryglicki Posted September 29, 2022 Share Posted September 29, 2022 I would really like to have a powerful 253.7nm LED :-) Link to comment
JMC Posted September 29, 2022 Share Posted September 29, 2022 3 hours ago, colinbm said: Sorry Jonathan but I had a senior moment & the LED light is 255nm. No worries. Still very impressive. Link to comment
Andy Perrin Posted September 30, 2022 Share Posted September 30, 2022 On 9/29/2022 at 12:01 PM, lukaszgryglicki said: I would really like to have a powerful 253.7nm LED :-) LEDs have a medium-sized bandwidth, so even if the peak was at 253.7nm, it would probably be 240-270nm in practice. And the peak moves as it heats up, so the “0.7” would truly be meaningless. Link to comment
lukaszgryglicki Posted September 30, 2022 Share Posted September 30, 2022 Well then just 250 or 255. But having 3W radiant output or more... not those available now. Link to comment
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