Автор: volokin
Дата: 01-05-08 21:59
Rodagon да, с никсъна за пръв път на едно мнение. Иначе е то малко коментар, от малко форум, малко на английски ![[smilie25]](https://photo-forum.net/forum/smileys/smiley25.gif)
Your results make a lot of sense. The Rodagon 1:2,8/50 has been highly optimized for 10x magnification and enlarging 19x is beyond the design consideration. The older 1:5,6/50 should be a bit better as they were designed for 15x. The latest and greated APO-N too will do fine here as they are designed to be used upto 20x but it is really the territory of the Rodagon-G series. Newer objectives like Componon-S and Rodagon are designed for less enlargement than previous designs. Within their range, say at 10x, old (Rodagon 1:5,6/50) and new (Rodagon 1:2,8/50, Componon-S 1:2,8/50mm) don't really matter as much as the total optical system, inclusive of the enlarger illumination system. While the Rodagon APO-N is beyond any doubt perhaps the finest general purpose enlarger lens on the market today in an condensor enlarger it will have a hard time against the 20+ year old Focotar-2 at f5.6 yet will slightly edge it out on a diffusion enlarger (the colour correction and coatings seem to be a tiny tad better on the Rodagon APO-N). However good the 50mm Focotar is--- and its last incarnation was a selected Componon 1:4,0/50mm modified to 1:4,5/50mm--- the head-on-head comparisons I've done (granted only one sample of each and both in pristine condition) showed the Focotar-2 to be shaper (more contrast and higher resolution, less color fringing etc.) by leaps and bounds. What's even more intesesting, to add fuel to the "new is better" debatte, is the kind of performance one can get from a 50 year old Ektar or 30+ year old Boyer--- I got 95mm that really suprized me having found it covering 6x9cm and outperforming more wellknown and highly regarded German lenses.
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