Schneider Apo-Digitar 43mm (New)

[brianc1959]

I received this from Schneider without any note about nondisclosure.
So I think it's okay to make it available here:

[attachment=18780:TD_AP_56...450_1CID.PDF]
[attachment=18781:TD_AP_56...450_2CID.PDF]

Price: €2178,-

Thanks very much for sharing this.  Studying the data sheets, it seems that the new 43mm/5.6 is simply a scaled version of the 35mm/5.6.  Angular field of view, relative illumination and design type are virtually identical.  MTF is slightly worse for the 43mm, perhaps simply because the geometrical aberrations are scaled up slightly.  I'm thinking the new 28mm from Schneider might be a departure from their long line of Super Angulon type designs.

[JdeV]

It's hard to compare the Schneider and Rodenstock specifications and I'm probably making some mistake but if I convert Schneider's illumination fall-off into stops i.e. 50% is one stop, 25% two stops, 12.5% three stops then there doesn't seem to be a great deal of difference in fall-off between the Schneider 43mm and the Rodenstock 40mm. This seems rather surprising.

Having used the Rodenstock a bit it is phenomenally sharp even at F5.6 but on paper it has a lot more distortion. I wonder if the greater coverage the Schneider offers is borne out in practice.

[brianc1959]

It's hard to compare the Schneider and Rodenstock specifications and I'm probably making some mistake but if I convert Schneider's illumination fall-off into stops i.e. 50% is one stop, 25% two stops, 12.5% three stops then there doesn't seem to be a great deal of difference in fall-off between the Schneider 43mm and the Rodenstock 40mm. This seems rather surprising.

Having used the Rodenstock a bit it is phenomenally sharp even at F5.6 but on paper it has a lot more distortion. I wonder if the greater coverage the Schneider offers is borne out in practice.

Regarding illumination falloff, I think you are correct.  Comparing MTF at f/5.6, the Rodenstock 40/4 looks better at 40lp/mm than the Schneider 43/5.6 does at 30lp/mm

[Christopher]

Regarding illumination falloff, I think you are correct.  Comparing MTF at f/5.6, the Rodenstock 40/4 looks better at 40lp/mm than the Schneider 43/5.6 does at 30lp/mm

Yes I think it will be very interesting how both lenses compare. The Schneider certainly has the bigger advantage on paper, but we also know that Rodenstock is quite conservative with their specs.