Jump to content


PeteAtkinson

Member Since 25 Nov 2008
Offline Last Active Dec 01 2016 07:19 PM
-----

Posts I've Made

In Topic: WTB Nauticam zoom gear for Nikon 10-24mm

29 October 2016 - 07:11 AM

I have one. peteatkinson00 at gmail.


In Topic: Rectilinear wide angle for Nikon DX

30 August 2016 - 06:36 PM

Adam, the 8-16 Sigma is rectilinear - there's no full circle.


In Topic: Rectilinear wide angle for Nikon DX

29 August 2016 - 06:11 PM

Sigma 8-16. It seemed to me to be "better" than the Nikon 12-24, but that's a subjective view.


In Topic: Full Frame SLR wide angle corrector port tests

14 April 2016 - 12:31 AM

I am amazed! Concave side towards the dome!! I will try to find one at ADEX to look at it! Thanks.


In Topic: Full Frame SLR wide angle corrector port tests

10 April 2016 - 06:55 AM

Perhaps someone with this corrector lens could measure the curvature of both surfaces, to determine whether one or both are aspheric. The way I would do this is to scribe approx. curvature on a piece of thin card, cut it out, and see if it fits flush to the surface of the lens. Then do another, making adjustments till it's a perfect fit.

In New Zealand 20 years ago I had coated plano-convex dioptres made which were said to flatten the curvature of field, but B&W diopters always seemed to give better results.