Re: Faster Glass ...or Image Stabilizer?
2
mvrbnsn wrote:
I tried a 35 mm F/2.0 IS on my EOS M and it had wonderful clarity, but even wide open it wasn't as bright as I had hoped in low light.
It is only f/2.0, but for non moving subjects this is combined with IS. Furthermore the AF is much faster and a bit more accurate.
For moving subjects in low light the AF of the 32mm is often to slow.... It has the slowest stm implementation i have seen (slower than the ef-m 22mm EF 50mm, EF 40mm, EF-s 24mm, ef-m 11-22mm). That is also the reason this lens has a focus limiter whyle the EF 35mm f/2.0 IS USM has not. The latter simply doesn't need it, whyle it has about the same magnification factor.
Since it is an EF lens (full frame) the EOS M series being APS-C doesn't really take full advantage of the light gathering capability.
That is true, however, it has less vignetting than the 32mm (or light fall of, whatever you name it).
Having said that I have gotten nice results with my 50 mm F/1.8 on the M, though it too is an EF lens.
This lens is not the best performing lens at borders and corners, and therefore best suited for aps-c
My point being that sometimes I forget that the EF lenses while often awesome on a crop body in terms of clarity, may not be optimized on them because of the difference in diameter and distance to the sensor.
Maybe it is more a matter of pixel density of the aps-c sensor not being optimized for the full frame lens.
(admittedly I am not a techie so don't fully grasp all of the nuances of that).
I haven't tried the 32 mm f/1.4 yet....
I did, and i returned it. Stopped down for landscapes i have other options sharp enough for me. I found the AF too slow in general, and in low light slightly inaccurate compared to my other lenses. It was clearly visible working with speedlites in low light, as this gives low enough ISO's to see the AF of this lens can't handle the sharpness of this lens. Without speedlites the non-ideal AF results will be camouflaged by higher ISO noise though.
When the AF of the lens hits at f/2.0 it is crazy sharp. Better than my Sigma 18-35mm and way better than the Canon 35mm f/2.0 IS USM at the same aperture. But unfortunately it has its flaws, so i couldn't justify its price:
- slow AF
- slightly inaccurate AF in low light (i would estimate 50 or 60% having focus being on par with the lens its sharpness in situations other options still give about 90%)
- No IS
- can not be speedboosted
- can not be mounted on EF-s, EF or R cameras.
- can not be adapted to Sony E or FE cameras
- the sigma 30mm f/1.4 will likely more affordable, and who knows it is even focusing faster as my sigma 18-35mm f/1.8 have proved a sigma can focus faster than a Canon lens.
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If your facts are different we could save the peace just by calling it copy to copy variation.