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#1
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135 mm or 150 mm Schneider enlarging lens 4 x5 ?
To All:
Have seen varying degrees of opinion first, if millimeter size of lens between 135 mm or 150 mm enlarging lens have any distinct advantage/disadvantage over one another for printing 20 x 24 in B & W printing? Second, any distinct advantage/disadvantage to go 135 mm or 150 mm in choice of Schneider Componon-S or Schneider APO-Componon-HM in B & W 20 x 24 printing? Thanks ahead to all Jack Eyler |
#2
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135 mm or 150 mm Schneider enlarging lens 4 x5 ?
Depends on *what* you are printing ... or are we just to
a s s u m e that you are talking about enlarging 4" x 5" sheet film? "EXPRODUCER" wrote in message ... To All: Have seen varying degrees of opinion first, if millimeter size of lens between 135 mm or 150 mm enlarging lens have any distinct advantage/disadvantage over one another for printing 20 x 24 in B & W printing? Second, any distinct advantage/disadvantage to go 135 mm or 150 mm in choice of Schneider Componon-S or Schneider APO-Componon-HM in B & W 20 x 24 printing? Thanks ahead to all Jack Eyler |
#3
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135 mm or 150 mm Schneider enlarging lens 4 x5 ?
Have seen varying degrees of opinion first, if millimeter size of lens
between 135 mm or 150 mm enlarging lens have any distinct advantage/disadvantage over one another for printing 20 x 24 in B & W printing? Second, any distinct advantage/disadvantage to go 135 mm or 150 mm in choice of Schneider Componon-S or Schneider APO-Componon-HM in B & W 20 x 24 printing? For big enlargements, the longer the lens the better. You'll get better definition in the corners. So go with the 150mm. I don't see what an APO lens will do for you if you're enlarging B & W. The virtue of Apochromatic lenses, as far as I know, is that they bring light from different colors to a common focus. So, unles you have evidence that an Apo-Componon has better resolution than a plain Componon, I wouldn't spend the extra money on one. Bob G |
#4
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135 mm or 150 mm Schneider enlarging lens 4 x5 ?
"Bob G" posted:
"... I don't see what an APO lens will do for you if you're enlarging B & W. The virtue of Apochromatic lenses, as far as I know, is that they bring light from different colors to a common focus. So, unless you have evidence that an Apo-Componon has better resolution than a plain Componon, I wouldn't spend the extra money on one. ...." Does the enlarger use *white* light? You are correct when you posted "The virtue of Apochromatic lenses, as far as I know, is that they bring light from different colors to a common focus" ... but NOT correct when you assumed that B&W negatives would not benefit from the use of an apochromaticaly corrected lens. UNLESS the enlarger is fitted with some kind of monochromatic filter to allow only a single color of light to be projected ... an Apo lens **will** be superior. |
#5
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135 mm or 150 mm Schneider enlarging lens 4 x5 ?
RSD99 wrote:
"Bob G" posted: "... I don't see what an APO lens will do for you if you're enlarging B & W. The virtue of Apochromatic lenses, as far as I know, is that they bring light from different colors to a common focus. So, unless you have evidence that an Apo-Componon has better resolution than a plain Componon, I wouldn't spend the extra money on one. ..." Does the enlarger use *white* light? You are correct when you posted "The virtue of Apochromatic lenses, as far as I know, is that they bring light from different colors to a common focus" ... but NOT correct when you assumed that B&W negatives would not benefit from the use of an apochromaticaly corrected lens. UNLESS the enlarger is fitted with some kind of monochromatic filter to allow only a single color of light to be projected ... an Apo lens **will** be superior. Normal black and white paper is fitted with a filter that emphasizes blue light to the exclusion (partial, I admit) to other colors. In fact, my focusing gizmo even comes with a deep blue filter (47B or something like that) so what I see and what the paper sees is pretty much the same. It is too deep to focus by, so I do not use it. -- .~. Jean-David Beyer Registered Linux User 85642. /V\ Registered Machine 241939. /( )\ Shrewsbury, New Jersey http://counter.li.org ^^-^^ 17:30:00 up 14 days, 18:13, 4 users, load average: 4.13, 4.10, 4.06 |
#6
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135 mm or 150 mm Schneider enlarging lens 4 x5 ?
4 x 5 sheet
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#7
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135 mm or 150 mm Schneider enlarging lens 4 x5 ?
EXPRODUCER wrote:
To All: Have seen varying degrees of opinion first, if millimeter size of lens between 135 mm or 150 mm enlarging lens have any distinct advantage/disadvantage over one another for printing 20 x 24 in B & W printing? Second, any distinct advantage/disadvantage to go 135 mm or 150 mm in choice of Schneider Componon-S or Schneider APO-Componon-HM in B & W 20 x 24 printing? Thanks ahead to all Jack Eyler A shorter focal length lens will allow you to make bigger prints at the maximum height of the enlarger lens. A longer focal lens will tend to have more uniform illumination. Also, it is probably harder to maintain high quality over the field with a shorter focal lens. |
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