|Posted: Fri Jun 22, 2018 4:15 am Post subject: Is this heat distortion?
|I was going through some old pictures that I had not looked at since uploading to LR a few years ago. I was using a Canon 5Dii with a C/Y Zeiss Vario-Sonnar 100-300mm. I have lost the notes I'd take when using a lens where the EXIF won't be correct, so I have no certainty as to the aperture or the focal length, but would guess it's f11 somewhere close to 180-200mm.
Other shots taken that day are tack sharp, no distortion at all, regardless of the distances involved. Later shots (later in the year) are also tack sharp, even when shooting detail on mountain tops at sunset at 300mm. So I don't think it's the lens.
Here's the issue, from a 100% crop in th centre of the shot.....that telephone should be straight, as should the fence posts.
I'd be happy to hear any ideas on what is going on, and what I might do to counteract it in future.
Digital Camera: Canon 5Dsr, Leica MM246 & M10, Sony A7r
SLR Lenses: Carl Zeiss T* (C/Y, ZE/ZF.2, Loxia); Pentax Taks 50/1.4 (7 & 8 elements versions).
RF lenses: Zeiss ZM, assorted Japanese LTMs & Nikkor-S