diaphrAgm!
On Wed, Mar 1, 2017 at 11:47 PM, Rick Beckrich <rbeckrich@xxxxxxxxx> wrote:
> All this talk of old lenses rang true. I just unearthed my 4/200 Zuiko,
> the one with the stuck diaphargm.
>
> http://zone-10.com/tope2/main.php?g2_itemId=21623
>
> For a grab shot of another of my favorite birds... Straight from the
> camera (because I don't know any better.)
>
> Old school Rick (Really old)
>
> On Wed, Mar 1, 2017 at 11:19 PM, Moose <olymoose@xxxxxxxxx> wrote:
>
>> 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/
>>
>>
>
>
> --
>
> As much as I hate to "crow", I'm delighted to tell you that my 5-star
> reviewed hardcover book for kids, ages 4-to-8,
> *The Little Crow Who Could Not CAW
> <http://www.amazon.com/Little-Crow-Who-Could-Not-ebook/dp/B01B2028SS/ref=sr_1_1?ie=UTF8&qid=1455042958&sr=8-1&keywords=rick+beckrich>,*
> is
> finally available as an interactive Kindle e-book from Amazon.com.
>
> (P.S. - The Kindle reader is a free app from Amazon that works on PC,
> laptops, and most hand-held devices.)
>
--
As much as I hate to "crow", I'm delighted to tell you that my 5-star
reviewed hardcover book for kids, ages 4-to-8,
*The Little Crow Who Could Not CAW
<http://www.amazon.com/Little-Crow-Who-Could-Not-ebook/dp/B01B2028SS/ref=sr_1_1?ie=UTF8&qid=1455042958&sr=8-1&keywords=rick+beckrich>,*
is
finally available as an interactive Kindle e-book from Amazon.com.
(P.S. - The Kindle reader is a free app from Amazon that works on PC,
laptops, and most hand-held devices.)
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|
