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RE: [OM] 90f2 with 80f4 CU lens (was OM2000 vs OM3)

Subject: RE: [OM] 90f2 with 80f4 CU lens (was OM2000 vs OM3)
From: "Tom Trottier" <tom@xxxxxx>
Date: Wed, 8 Sep 1999 13:51:22 -0400
Any difference in sharpness at different apertures?
One advantage of the close-up lenses is much greater brightness, for 
shorter exposures & better viewing.

Tom

--- Original Message ---
From:                   Ross Waite <rmwaite@xxxxxxxxxxxxxx>
Date sent:              Wed, 8 Sep 1999 14:29:29 +1000
... 
> A better option may be a Nikon T series close up lens.  These are high 
> quality 2 element designs, specifically for use with focal lengths from 
> 80mm to 200mm, and have been highly recommended by John Shaw in his book 
> "Closeups In Nature".  They come in 2 strengths and 2 filter sizes:
> 
> 3T = mag +1.5, 52mm
> 4T = mag +3.0, 52mm
> 5T = mag +1.5, 62mm
> 6T = mag +3.0, 62mm
> 
> I have used the 4T with a 49mm to 52mm step up ring on my old Tamron SP 
> 90mm f2.5 macro lens with good results.  When I am travelling light, it 
> saves taking extension tubes to get to 1:1.  I have just sent some slides 
> for processing with a few test shots using the 4T on the 85 f2.  I will 
> probably take this combo on my trip next year to UK, Ireland & Europe to 
> give me some macro capability without the weight and bulk of either of the 
> 90mm macro lenses.  I did some direct comparisons at around 1/2 life size 
> with the 90/2.  I will let you know how they compare.
...
------------------
From:Tom Trottier, ACT Productions Inc.
    __o  tom@xxxxxx  http://www.act.ca
  _ \<   +1 613 594-4829  fax +1 613 594-8944
(*)/'(*) 199 Holmwood Ave, Ottawa, Ontario Canada K1S 2P3
"Make it as simple as possible, but no simpler" - Einstein

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