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Canon XI 100mm f1.5 lens
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PostPosted: Sat Dec 23, 2017 2:45 pm    Post subject: Canon XI 100mm f1.5 lens Reply with quote

Hi folks,
I found this lens in my local secondhand store, among all the kit zooms. For $150 I thought it was worth a try. It appears that the XI lenses were x-ray lenses, but this one is a surprise. It does not have the usual soft bloom and hazy look of the x-ray kowas and heligons. I'm posting some samples. Mounting it was not easy, since the registration distance for infinity focus is 0.5mm from the mount of the Sony NEX. I have managed to modify a 65mm helicoid so that the back of the lens can get flush with the M65-to-NEX adapter I have, in which case it focuses to ~5 meters, which is perfectly OK for the use that I will put it to.

No vignetting even at that short flange distance, and quite sharp up to about 2/3 of the way out on FF. Even the corners are not bad. See what you think. And I quite like the bokeh as well Smile
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PostPosted: Sat Dec 23, 2017 4:45 pm    Post subject: Reply with quote

Like 1 Like 1 #7

#8 interesting!


PostPosted: Sat Dec 23, 2017 6:06 pm    Post subject: Reply with quote

Psychedelic! But once you get close to the subject, the character suddenly seems very different. Well done, thanks for sharing!


PostPosted: Sat Dec 23, 2017 6:31 pm    Post subject: Reply with quote

Congrats, great find!!

That whole series of lenses is quite interesting. I once found this f1.3/75mm one with aperture even...
http://www.macrolenses.de/ml_detail_sl.php?ObjektiveNr=153
and some are extremely fast, like this f0.75/65mm
http://www.macrolenses.de/ml_detail_sl.php?ObjektiveNr=109
But admittedly, all not that easy to adapt!


Last edited by kds315* on Sun Dec 24, 2017 1:09 am; edited 1 time in total


PostPosted: Sat Dec 23, 2017 10:43 pm    Post subject: Reply with quote

Like 1


PostPosted: Sun Dec 24, 2017 10:44 am    Post subject: Reply with quote

Looks like the image circle is around 65mm on this lens, which is pretty crazy considering the registration distance. I’d love to see the optical formula of this puppy.


PostPosted: Sun Dec 24, 2017 10:05 pm    Post subject: Reply with quote

Like 1 small Picture of the lens?


PostPosted: Wed Dec 27, 2017 2:39 pm    Post subject: Reply with quote

Nordentro wrote:
Like 1 small Picture of the lens?

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Here is the lens in a 65mm helicoid


PostPosted: Fri Jan 05, 2018 5:27 pm    Post subject: Reply with quote

I'm curious how you managed to mount the lens on the Helicoid. Is it a permanent mount? I have a 50 f0.75 XI I am trying to find a better solution for (like a clamp) than my DIY effort.