HelenaN wrote:
This thread continues to inspire. Great work everyone.
sebboh wrote
for the best, we have a large extended family of nuthatches and they're all *ssholes. they only eat sunflower seeds and dump out all the other seeds to get to them. Very nice photo! Funny, we have the same birds here, or at least very, very similar, and your description is spot on. It doesn't even help to just serve sunflower seeds, they still throw out 4-5 seeds for each one they eat...
doh, now you tell me! i just bought a 10lb bag of just sunflower seeds in hopes they'd focus on that.
lostinjapan wrote:
sebboh wrote
lostinjapan wrote
carstenw wrote
Interesting. On my A7 the lens works pretty well, but I would like to improve it a bit. I will try the plugin. Any tips for making a profile? It took me a lot of trial and error before I was able to make a good profile for the lens, The instructions for the Flat Field plug in say you need to create a new profile for each lighting condition and aperture setting. I never found that to be necessary.
What worked for me to take a large plain white sheet of paper and set it up the shade with no direct lighting or shadows falling on it. Then I focused the lens at 1meter at F/8 and overexpose the image by two stops. (I tried everything from 0 to 4 stops, but two worked the best). After imported into LR, it has to be converted to DNG to use the plug in. Once it was in LR, I adjusted the brightness to just below clipping, cleaned up any a few dust spots and set the white balance to get the image as close to a natural white as possible. Then I exported it as another DNG file to use only with the FF plugin.
Works perfectly for me. When I use the CV12mm I found it works best if I just set it on F/8 and set the focus point at about 1m. Essentially everything is in focus from 30cm to forever. I am quite happy with the results on the A7r, it is wonderful lens.
Hope it helps.
Ryan haven't used the 12mm, but using the LR plugin with other lenses i found i got better results by having a near focus and far focus profile as well as a profile for each aperture. I havent tried that I might give it ago, but due to the nature of a 12mm lens not sure how well that would work. The only real problem with the Flat Field Plugin is that due to the heavy vignetting it introduces a fair bit of noise in the corners. The other option I found was to bracket three shots at 0, +1.5 and +3.0 and then hand blend them in PS. That gave me slightly better results than the plugin, but took alot more time and effort.
Ryan
yeah, none of the lenses i've used it on had anywhere near as bas vignetting (though worse color shift). i just used the plugin to correct color i always left the vignetting in.