DPReview.com is closing April 10th - Find out more

Sigma 150-600mm Contemporary + 1.4x extender vs Canon RF800mm F11

Started 3 months ago | Questions thread
robgendreau Forum Pro • Posts: 10,917
Re: Sigma 150-600mm Contemporary + 1.4x extender vs Canon RF800mm F11

Kmccarthy wrote:

I’m looking for a 800mm lens for birding and astrophotography on a Canon R10.

I’m considering the Sigma EF 150-600 Contemporary + 1.4x extender or the Canon RF800mm F11

The canon is lighter and cheaper, but fixed focal length and fixed F11. Should be good for birding but not ideal for astrophotography (except the moon).

The sigma is heavier and more expensive (with extender), but more flexible and wider aperture, even with with extender (F9). Probably slightly better for astrophotography (planets) than the Sigma.

Anyone have experience with these two lenses? Any opinions?

I agree with the earlier comment about some kinds of astro. Some stuff might work though assuming you've got a tracker. The Sigma is faster, but with a tracker you could take longer exposures anyway. The 150-600 C not the greatest lens, but a great value. I got mine before the 600mm and 800mm RFs came out, and I keep it because I prefer and need the zoom.

But it does have the pulsing problem on an RF camera. More apparent close in, and if you use other means to focus vs continuous you can work around it. But that would argue in favor of the 800mm. I don't see Sigma making any attempt to fix it with firmware, and it's not Canon's problem.

 robgendreau's gear list:robgendreau's gear list
Pentax 645Z
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow