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Canon RF-mount Lens Forum
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22/03/2026 7:05 am
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I finally upgraded to a 90D and now I'm desperate for more reach for birding and some deer I see around my place in Oregon. I've been looking at the Sigma 150-600mm Contemporary since it fits my $1,000 budget but some forums say it has focus pulsing issues on the 90D body specifically. Then others swear by the Tamron G2 version but its a bit more expensive and maybe heavier? I'm gonna be hiking a lot so weight is kinda a big deal. Is the Canon 100-400mm L II worth the extra cash even if its used and has less reach? I'm just torn on if the extra 200mm is worth the potential headache of third party glass...
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22/03/2026 7:20 am
Jumping in here because i totally agree about the autofocus speed. That 90D sensor is picky with glass.
- Canon EF 100-400mm f/4.5-5.6L IS II USM: Best AF tracking and super sharp, but you lose reach.
- Sigma 150-600mm f/5-6.3 DG OS HSM Contemporary: Cheaper and lighter, tho pulsing happens.
- Tamron SP 150-600mm f/5-6.3 Di VC USD G2: Heavier but better weather sealing. The 100-400 handles the high resolution better imo.
