TWI by Dustin Abbott said:
TWI by Dustin Abbott said:
mrsfotografie said:
TWI by Dustin Abbott said:
By the way, Bryan Carnathan just released his review of the 45mm VC and actually gave it the most enthusiastic review I've EVER seen him give a Tamron.
http://www.the-digital-picture.com/Reviews/Tamron-45mm-f-1.8-Di-VC-USD-Lens.aspx
Ironically he found the CA less objectionable than me. That surprised me, but its encouraging that perhaps it will bother me less when I shoot more with the lens.
P.S. Since I don't (yet) have a 5Ds body, I was glad to read that the image quality surpassed the increased scrutiny that the high resolution sensor provides.
Dustin, in your experience how much does the CA issue improve when the lens is stopped down? This is the only thing holding me back at the moment.
From what I can see by looking at the TDP test charts and your real-world samples, it's not really transverse (lateral) CA that can be an issue with this lens but rather the axial (longitudinal) kind...
I'm happy that Bryan did a review as well, it works well for me to get a good impression of a lens by considering his technically oriented reviews and compare them to yours which give a more 'real life' feeling. Based on that I've already gone ahead and purchased a lens or two
It definitely clears up when stopped down. I have a stopped down version of the image I shared on the first page of this review and there is no visible CA. My Lightroom is busy outputting images for a client at the moment, but I'll output an example when its done and post it here.
I found just the slightest trace at a pixel level on one branch, but not around the leaves. I'm attaching three images:
1) The photo (at f/4)
2) Crop of the "area of vulnerability"
3) Crop after a one click Lightroom correction.
Hopefully this will give you a clear look as to whether or not the CA is a serious issue for you.
Thanks Dustin
It looks a lot better now. Realistically I would stop down to about f/5.6 or so for a shot like this so CA should probably be even less and not be issue for me, possibly removing the need to correct in post all together. I do recognize that back-lit branches always present an unforgiving situation to any lens, and whether to correct or not depends on the severity of the aberration and end-use of the picture.
In any event it's good to see the purple CA easily corrected in post. I wonder how DPP will fare with that, given that by editing the exif data, it's possible to enable the lens aberration correction functionality in DPP for third-party lenses. I already got great results getting DPP to 'think' my Tamron 28-300 is actually a Canon 28-300. Of course the lens profiles aren't equal but it's easy to tweak the image using the sliders. For the 45mm I would like to try out the Canon 50mm f/1.8, F/1.4 or f/1.2 profiles to see which gives the best comparable correction results. Note that I do use Lightroom for my Sony raws but I have a strained affair with that software and prefer DPP for my Canon files because of editing speed and OEM in-camera function support.
FWIW Lightroom 6.2.1 does already include the Tamron 45mm lens correction profile. Have you tried that, yet? It may give better results than the fringe color selector method.