Alps visit - Monochrome 5DSR and Heliopan RG715

[JMC]

A few shots from out recent Alps visit, all taken on my Monochrome EOS 5DSR and using a 17-40mm lens and Heliopan RG715 filter.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[eye4invisible]

Very nice! I especially like the one of the heart-shaped lake.

[Andy Perrin]

Nice. How did you not take a photo of your wife next to the heart shaped lake? :)

[A Stranger In The Wind]

Excellent, I normally like landscape on it's own but I like the first shot with the road and the one with the building. I think it is the darkened glass and the s curve road that draws my attention.

[JMC]

Thanks all. Andy, I think I got a colour one of my wife and the lake, maybe, hopefully (if not I'll never hear the end of it....).

[Cadmium]

Jonathan, Very nice, I enjoy these photos! :-)

[bobfriedman]

interesting... i heard that monochrome conversions did not do well in the infrared - presumably the infrared is enhanced with the microlenses - not sure... which is why i had BG-38 replace my ICF/AA filter. but based on your results i would say this is clearly not a problem.

 

nice shots.

[JMC]

Bob, my experience so far has been mainly with the RG715, and it has been no problem at all with that. I think the microlenses issue becomes more apparent as you go to longer wavelengths, and then the sensitivity of the monochrome conversion drops in relation to the standard multispectral one with the Bayer filter retained. I must do some head to heads with the IR filters I have.

[JMC]

A very quick and dirty comparison of 4 different IR filters - Heliopan 715, 780, 830 and 1000 - using both my monochrome and multispectral EOS 5DSR cameras in the garden. Canon 17-40mm lens (at 20mm), ISO400, f11, and exposure varied for each filter. Both cameras set to custom whitebalance, and saved as RAWs and small jpegs. These were just from the jpegs. Multispectral jpegs were then desaturated, and both cameras images reduced in size for here.

 

Heliopan 715 filter - monochrome camera, 1/60s

 

Heliopan 715 filter - multispectral camera, 1/60s

 

 

 

Heliopan 780 filter - monochrome camera, 1/40s

 

Heliopan 780 filter - multispectral camera, 1/40s

 

 

Heliopan 830 filter - monochrome camera, 1/20s

 

Heliopan 830 filter - multispectral camera, 1/20s

 

 

Heliopan 1000 filter - monochrome camera, 1/5s

 

Heliopan 1000 filter - multispectral camera, 1/5s

 

 

Overall the monochrome camera images have slightly less brightness than the multispectral ones, but not a huge problem and it is still usable out to the 1000nm filter. And yes my sensors need cleaning..... I think the big difference in the 715 images was more due to a slight change in cloud cover than anything else, with more cloud for the monochrome image (the other images are more directly comparable as the lightly looked more stable during these).

[Andrea B.]

Ouch.

I know you were showing that the mono images in IR require more exposure time than the multispec images.

But the overexposures and low contrast of the multispec images are hard to look at.

 

Did you make a simple desaturation? Or a greyscale? Which looks better for this comparison?

[bobfriedman]

i would have equalized the exposures to compensate for the monochrome sensor conversion's increased sensitivity.. however, the monochrome sensor infrared images do not look bad at all in sharpness, albeit i would have increased contrast but for the comparison is fine. as i said the reason i did not go with a full spectrum monochrome sensor conversion is that i was under the impression that the infrared side would be not as good. i do have three 36mpx IR conversions, so i was covered and i wanted to be able to use lenses on my monochrome conversion that disallowed filters (e.g. Zeiss 15/2.8) so i opted to go with internal BG-38 glass ICF replacement and eliminated the infrared side of the spectrum.

[JMC]

I have done no additional processing of these images at all. These are straight from the camera as jpegs. They were meant purely to show the differences between the 2 cameras in terms of IR sensitivity, and are not meant to be correctly balanced etc.