From: Igor Roshchin
... Well, I understand the meaning of the word. But what does it
actually mean in the lens designation?
The new Sigma 18-250 lens is called "macro" "with a maximum
magnification ratio of 1:2.9":
http://www.dpreview.com/news/2012/06/15/Sigma-launches-18-200mm-F3-5-6-3-Macro-HSM-superzoom-lens
One of my older version Tamron zooms (70-300/4-5.6) and Sigma 24mm /1.8 EX DG
are also marked as "Macro".
While Sigma 24/1.8 goes to short focusing distances (about 18 cm / 0.6
ft), Tamron - doesn't (the shortest focusing distance is about 50 or 70 cm).
In contrast, D FA 100/2.8 Macro - has a clear long tail of focusing
distances where you achieve the macro regime.
So, what is necessary and sufficient for a lens to be called macro?
Igor
It's like Humpty Dumpty; it means whatever they want it to mean.
Especially when they're talking about zoom lenses.
--
PDML Pentax-Discuss Mail List
[email protected]
http://pdml.net/mailman/listinfo/pdml_pdml.net
to UNSUBSCRIBE from the PDML, please visit the link directly above and follow
the directions.
