On 2/28/2017 1:48 PM, Jim Nichols wrote:
Here is my only visitor today, following a downpour of rain this morning. At normal size, it looks fine. I went to a
larger size for the enlargement, after all of the "size matters" discussion on the LUG, but I think the extra
enlargement does an injustice to a lens from the 1980s.
http://www.gallery.leica-users.org/v/OldNick/20170228-DSCF0255.JPG.html
You may be unfairly maligning the lens. There's a lot of noise from ISO 3200 which obscures detail. The other thing that
happens as resolution gets higher and you crop further is that DoF gets shallower. The X-T2 has 22% greater nominal
resolution, so when you magnify it a lot, magnification is higher than you ever used on the X-T1. If you look at DoF
charts/calculators, you will see that the two factors driving it are human visual acuity and magnification. Magnify more
and DoF gets shallower.
It looks to me as though the head is slightly OoF, while feather detail suggests the plane of focus is on the front of
the body.
Noodling around a bit in PS; with more light, ISO of 400 or less, focused maybe 3/4" further forward, and I'll bet you
wouldn't be faulting the lens. Yeah, yeah, I know; it's essentially impossible to nail focus that closely with living
birds - but it's not the fault of the optics. :-)
Big old lenses aren't necessarily lesser quality. When I tested the early Nikkor-Q 200/4 from the early 60s that I
inherited from my dad against the later, more compact, Zuiko 200/4 and 200/5, the Nikkor handily whupped them both,
center and edge, in resolution @ 100%.
There is a price to pay in this case in size and weight. The 200/5 was one of my favorite walking around lenses, and is
WAY smaller and lighter than the "Q", but not as good optically.
Causes & Effects Moose
--
What if the Hokey Pokey *IS* what it's all about?
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|
