[Leica] So, wouldn't a 50mm Summicron LTM or 35mm f2 ASPH LTM be the best enlarging lens on earth?

[robertmeier at usjet.net (Robert Meier)]

Does an apo lens bring all three primary colors to the same focus point, as 
opposed to just two out of three for a non-apo lens?

If that is the difference, why would an apo lens offer any advantage for B&W 
printing?
 
On Nov 24, 2012, at 4:56 PM, "Jon Streeter" <jon.streeter at cox.net> wrote:

> Back in the '70s, a pro friend advised me to use Nikkor enlarging lenses. 
> So I bought a couple, one for use with 35mm negatives, one for 2 1/4 
> negatives.  I never had my own darkroom, always used rental darkrooms.  I 
> carried a kit of stuff such as a grain focusing device, variable contrast 
> filters, etc., as well as my trusty Nikkors.  My impression was that the 
> Nikkors were better than whatever the darkrooms had in stock.  I still 
> have 'em.  I should put them on eBay or Craig's List because I don't ever 
> intend to go into a darkroom again.  I very much prefer staying home with 
> the lights on near my family and using Photoshop.
> 
> -----Original Message----- From: Marty Deveney
> Sent: Saturday, November 24, 2012 2:25 PM
> To: Leica Users Group
> Subject: Re: [Leica] So, wouldn't a 50mm Summicron LTM or 35mm f2 ASPH LTM 
> be the best enlarging lens on earth?
> 
>> far from the "best enlarging lens on earth."
> 
> Indeed.  The Apo-El-Nikkors are the best enlarging lenses on earth.
> Taking lenses aren't optimised for close focus and don't have a flat
> enough field.
> 
> This all feels a bit like discussing spear sharpening techniques.
> 
> Marty
> 
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