I’ve been using the Cambo Actus and the HR Digaron 180/5.6 for a while. One of the things that has bothered me is how difficult it has been to focus critically. The standard focusing adjustment mechanism is just too coarse. Combo has a fix for that. Like most Cambo products, it comes at considerable cost,… [Read More]
Are DOF calculators useful? — part 1
In this article, there is the following statement: How precise are tables and depth of field calculators? Usually most tables pretend to have a precision that is neither available nor sensible in reality. That is partly because the values calculated in the tables are based on the arbitrary specification of a limit value (acceptable circle… [Read More]
FF and MF DOF compared visually
A couple of days ago I posted visual examples of what various circle of confusion diameters (hereafter called CoCs) looked like at somewhat greater than 100% magnification with the 80 mm f/1.7 Fuji GF lens on the GFX 100S. That was in response to repeated discussion on some fora saying that the DOF calculators don’t… [Read More]
DOF calculators and pixel peeking, 80/1.7 on GFX 100S
Ever since the GFX cameras first shipped, there has been a vocal minority claiming that DOF calculators don’t work with them, and that they have far less DOF that the calculators say. I have steadfastly maintained that thinking is wrong, and results from misuse of the DOF calculators, specifically picking an inappropriate circle of confusion… [Read More]
Photoshop content-aware fill for spotting
Most of the time, I use either Lightroom’s cloning tool for dealing with dust on the sensor. If I want more control, I use the Photoshop clone stamp tool. But neither does a good job with smooth gradients. Yesterday I was editing this image: There were some dust spots in the sky. Because of the… [Read More]
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