roundycat

pedantic, picky old git that I am all the reference works refer to them as flat darks.

Dennis

I noticed this thread ages ago but only just found my first effort. It was done on film using an F3 and 500 f4 lens and I only just managed to get the target on screen. It was a few days before I actually saw it it's that bad. A more recent one is with the ST10 and shows a bit more detail.

Dennis

it's worth bearing in mind that Takahashi went the flourite route for some time but the new FSQ is a modified Petzval four element design. Truly apochromatic from blue to IR and only uses ED glass. Seems to me that fashion plays a big part in lens marketing as opposed to design with various manufacturers trying to outdo each other in hype. I can remember a so-called expert selling Taks decrying my choice of TMB as a "oh dear! a triplet, all those glass to air surfaces", and now Tak make triplest and quadruplets! How does he sell those I wonder?

Dennis