R5 lunar photography with stacked EF extenders

Started Dec 14, 2021 | Discussions thread
Leeuw Regular Member • Posts: 109
Re: R5 lunar photography with stacked EF extenders

Bigger wrote:

Leeuw wrote:

Canon’s 2x ii extender can be stacked with the type iii extenders. Having 2x ii, 2x iii and 1,4x iii gives me several options to combine with my EF 600 f/4 II and R5.
This thread inspires me to start some experiments. For instance how would the 2x + 2x double stack perform. Maybe a bridge too far but why not give it a try.

What I have found from my terrestrial testing is that the EF 600 f/4 II definitely benefits from a 2x converter, even on a 5DsR with 4um pixels. The added 1.4x seems to help a little, especially on an R5, but I don't think there is any resolution left to get beyond that with ~4um pixels. The 2x + 2x might help with an R6 or other ~6um pixel camera, though.

Thanks, I will definitely try the 2x + 1.4x stack and see if the 2x + 2x does add something but probably not. Maybe a 8K video image stack can extract some extra details…..

Post (hide subjects) Posted by
(unknown member)
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow