Curious...about the coating.

[Dave Wilkinson]

While trying out my 'new' Canon 7 with f1.2, yesterday ( see my other post ) I took a close shot of a quayside bollard with thick, frayed rope ends, nicely modelled in the early morning sun. Out of quriousity I then took the same shot, at the same settings, with a Jupiter 8, of similar vintage. When scanning later, I was quite surprised at the difference between the two frames,-not in sharpness, or definition, but colour,-the Canon shot exhibited a cold 'bluish' tint, whereas the one from the J8 was much warmer, with 'pinkish' overtones. The Canon has a pale yellow/straw colour coating, and the J8 a definite deep blue,- but are my findings the result of coating difference, or down to lens design, colour correction-etc.? I believe the Canon is a Planar type, and of course the J8-a Sonnar. It's no big deal, - I like them both, and adjustments can be made post-capture, or via filters, but like I said,-I'm just qurious. 😕

Cheers, Dave. 🙂

 

[jlw]

Unless you were shooting transparency film, there are many other variables between image and final scan that could affect color rendition.

But yes, it's common for lenses of different manufacturers -- or even within the same manufacturer's line -- to exhibit warmer or cooler overall color. Coating is one factor, but so is the type of glass used (different optical glass types absorb the spectrum differently) and the optical formula (since this determines what types of glass will be used and how thick they are.)

Even the type of cement used to hold the elements together can make a difference, and this can vary with age as well.