Old 02-01-2016, 10:42 PM
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Regulus (Trevor)
Regulus - Couer de Leon

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Join Date: Nov 2011
Location: Devonport, Tasmania
Posts: 2,328
The EF50 f1.8 only fails in 2 areas against the 1.4: construction quality in too much plastic. And not having f1.4. Otherwise it tests about equal.
Mine is now in pieces and beyond salvation.
I can't help with ur problem Raymo except to say that the godawfully short travel distance between closest focus and infinity doesn't help. And I find this with all auto-focus lenses inc some macro, and it's annoying for someone who does it manually as much as i do.
I am looking at converting canon ed to ef mounts for this reason.
Painful getting sharp focus on astro objects with it.
I noticed a CA like colouring on any star shots i took and I think just my taking my fingers of the lens after focusing threw it out again. I tested it afterwards for CA on extreme contrasts and there was none, so......

Last edited by Regulus; 06-01-2016 at 08:39 PM.
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Old 02-01-2016, 10:55 PM
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doppler (Rick)
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Join Date: Nov 2012
Location: Mackay
Posts: 1,542
I have a canon 1100d and I find that the lens that it came with is near on impossible to focus with. I got this adaptor of ebay for a couple of $ so I can use some of my old pentax pk mount manual focus lenses on the 1100d
Defraction spikes are ok with me
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