Greetings to all that have not already declared me a fool from the title of this thread,
I feel as though I am disobeying one of photography's commandments: Thou shalt not use a step down ring on a wide angle lens.
Owning only Pentax primes, all of my filters are of a 49mm thread diameter. I have recently purchased a Sigma Super Wide II and want to use it for b&w work on film. To do so, I would be coupling it to a filter - if possible a 49mm filter.
I read recently of Nikonians using a 82-77 step down ring with the Sigma 20mm f1.8 on full frame -
geek7, 4th comment:
Flickr: Discussing Using 77mm filters with step-down ring? in Sigma 20mm f1.8
As a percentage of the original thread diameter, the 82-77 stepdown is 6.1% whereas the 52-49 stepdown is 5.8%. Furthermore, in the case of the Nikonians, the lens in question was 4mm wider.
Might I be able to commit original sin and use a step down ring with a wide angle lens in 135 format?
Thank you for your time,
Jay