Macro_Cosmos wrote:mjkzz wrote:with extended holidays, finally got some time to do some work. But today a big BUG caught me, spent 2 hours debugging it, it turns out at 1:1 with Zhongyi Super Macro Mk II, magnification is NOT 1:1, it is 1.16:1, or 1.16x. I thought I had some bug in my software and it is "good" for others to be aware of it, instead of pulling your hair out
Here is a video about it
Interesting video! Mag. calibration is always useful. This information is pretty crucial too, 1.16x is pretty far off from 1x, I'd accept 1.02x but not 1.16x. I would not have thought to measure the mag. of such lenses and simply believe the manufacturer's claim.
Always be sceptical I'd say.
Hi Guys,
Well I have some bad news for you guys, when I ran that 1x test earlier this year, for Ref:
https://www.closeuphotography.com/1x-test-2020
I think the only lens that was actually at 1x was the Printing Nikkor and that is only because I set the extension to focus at 1x. The rest of the lenses were almost all away from 1x, some like the Sigma was something like 1.05 or 1.1x. In fact I tested something like 5 sigma macros for that test, each model was a different ratio.
Maybe its something that is designed into the lens for expansion for shooting in hot and humid, and frigid conditions?
When is 200mm ever 200mm, more like 190mm, or f/2.8 ever f/2.8, more like f/3.5 or f/3.8, and 1x is rarely ever 1x in my experience.
Best,
Robert