Klaus, I'm really impressed by the color rendition you obtained with your mirror lenses.
Birna, that's a very effective shot. The snow really does look like sky at first glance.
If you were going to buy one today, which one would you choose, and why would you do so?
Despite owning several Reflex-Nikkors, I've generally avoided using them due to the unusual bokeh they display in most situations. They're also very vulnerable to wind vibration, or really any vibration, due to their extremely light weight in relation to their narrow angle of view. I'm going to try the 1000mm on the moon sometime, though. I also think Birna has convinced me to take it on my next trip to the desert for when I travel through large landscapes.
Here are a couple of shots with the 1000mm f/11 AI that illustrate the bokeh when using the lens relatively close up. I was able to minimize wind vibration from intermittent gentle breezes with careful timing; I could see the image in magnified live view oscillate from just a mild breeze. Technique included mirror up, remote, electronic first curtain, and not touching the lens or camera less than a few seconds before the shot. These photos were taken near the close focus limit of 8 meters, so depth of field is small (5cm or 2") despite the small aperture. The camera was a D810 at ISO 6400 due to poor light. Both photos are cropped and downsized.
_DSC2438 by
Bill de Jager, on Flickr
_DSC2433 by
Bill de Jager, on Flickr
By the way, I recently checked and the 50cm f/5 and the early 1000mm f/11 "F" version, despite being pre-AI, will mount safely on AI cameras due to adequate clearance for the aperture tab. The lens barrel does not extend as far towards the mount as it usually does on pre-AI lenses.