RF24-105/4 performance

Started 4 months ago | Discussions thread
OP Peak freak Contributing Member • Posts: 931
Re: I think it's time to go take pictures.

R2D2 wrote:

Peak freak wrote:

Thomas A Anderson wrote:

Peak freak wrote:

Thomas A Anderson wrote:

Peak freak wrote:

I have had considerable experience with Canon L lenses, I have read Rogers articles and so-on, but In think I am a difficult customer when it comes to lenses because they always (well, often) seem to have performance that doesn't meet my expectations.

So, for various reasons I am onto my third copy of the RF 24-105/4, but the first that has had 'real world' use. After cataloguing my first batch of maybe a 1000 images It meets my expectations and performs well - except at about 35mm.

In short, there is always some kind of performance drop off at 30- 40mm, mostly on the left (although centering generally seems good).

This example (IMO) is pretty bad, but the sort of thing that I see happening. Check out the left hand tree trunk.

Adobe defaults, sharpening 25. What do you guys think?

Curious if any of it could actually be due to (inaccurate) lens corrections at that focal length?

R2

Thanks, a valid point but I have (Adobe) profiles, distortion and vignetting zeroed out, and I work from there if needed.

In another thread I was having trouble with Adobe CC processing being brighter than I was accustomed to. Turned out it was appending the lens profile at default, and I find Adobe's vignette correction way to strong (bright). I was getting a bout 0.25-0.3 stop global exp increase! [EF 16-35/4].

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