axlotl
Senior Member
at 105mm f7.1
I ordered this lens 9 weeks ago and it arrived yesterday. I think supply has been held up in the Covid19 lockdown.
Anyway better late than never.
I have done a first round of tests on an EOS RP and it is coming up well with no serious problems.
Note 1: The camera used must have the latest firmware installed. This is FW 1.6.0 on EOS R and 1.4.0 on EOS RP.
Note 2: If using RAW capture a Raw converter with a good lens profile must be used. I use Adobe Camera Raw which works just fine (as I assume will Lightroom).
Sharpness: This is very good in a large circle including the edges at all focal lengths and apertures.
Corners are slightly soft at 24mm f4 but cleanup well by f8.
My copy is just slightly decentered leading to mild softness top right and top left just in the corners at 70mm and 85mm. This is not really improved by closing the lens aperture but would not be noticed in most photos anyway.
Distortion : There is huge barrel distortion at 24mm which is why a lens correction profile is required. The one in ACR works well.
Peripheral shading: This is considerable at 24mm less so at other focal lengths but easily correctable.
Color fringing: This can occur at high contrast edges but is mild and easily corrected.
Mechanical: zoom, IS and single AF all appear to work well. No problems encountered thus far. Servo AF not yet tested.
Flare: the lens appears quite resistant to flare even when I tried to induce it.
Overall: This is a very good general purpose utility lens.It is good value for money. It would be very good for travel and all general photography, mainly outdoors but it is f4 at the wide end which can be useful indoors.
Andrew