On a 10MP 4/3 sensor diffraction will already be starting to creep in at
an indicated f/8. But the 2X converter will add 2 stops to your
indicated aperture. Shooting at indicated f/4 you're at an effective
f/8. My guess is that your best results will be between indicated f/4
and f/8. (f/8 and f/16 effective).
Chuck Norcutt
On 5/1/2012 5:55 PM, Jim Nichols wrote:
> Hi Wiliam,
>
> I noticed that too. I suspect it is because the Towhee was shot with the
> lens at f/4, while, with the Cardinal, I stopped the lens down to f/8. Now
> that I see that 1600 is usable, I have to find the best lens opening to use.
>
> Jim Nichols
> Tullahoma, TN USA
> ----- Original Message -----
> From: "Wiliam Wagenaar"<wiliam@xxxxxxxxx>
> To: "'Olympus Camera Discussion'"<olympus@xxxxxxxxxxxxxxxxx>
> Sent: Tuesday, May 01, 2012 4:04 PM
> Subject: Re: [OM] IMG: Exploring Higher ISO Values
>
>
>> Jim,
>>
>> The female Cardinal looks sharper to me than the Towhee despite being shot
>> at iso1600.
>>
>> Wiliam
>>
>> -----Original Message-----
>> From: Jim Nichols [mailto:jhnichols@xxxxxxxxxxxxx]
>> Sent: dinsdag 1 mei 2012 20:38
>> To: LUG@xxxxxxxxxxxxxxx
>> Cc: Olympus Camera Discussion
>> Subject: [OM] IMG: Exploring Higher ISO Values
>>
>> With the 2X Extender on the Leica Telyt 250/4, shutter speed, and DOF
>> suffer. I decided to explore some higher ISO values with the E-510. Most
>> of my work to date with this combination was at ISO 400.
>>
>> Towhees are normally ground feeders, but once or twice a year I will spot
>> one on a feeder. Here the Towhee Male is captured at ISO 800, 1/160 at
>> f/4:
>>
>> http://gallery.leica-users.org/v/OldNick/Towhee+Male+ISO+800.jpg.html
>>
>> A Cardinal Female served as my subject at ISO 1600, 1/60 at f/8:
>>
>> http://gallery.leica-users.org/v/OldNick/Cardinal+Female+ISO+1600.jpg.html
>>
>> To my eye, 800 is quite useable, as is 1600, though with a bit more noise.
>> I must admit, though, that the higher ISO values of modern sensors would
>> be
>> appreciated for this work.
>>
>> Comments and critiques welcomed.
>> Jim Nichols
>> Tullahoma, TN USA
>> --
>> _________________________________________________________________
>> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
>> Archives: http://lists.thomasclausen.net/mailman/private/olympus/
>> Themed Olympus Photo Exhibition: http://www.tope.nl/
>>
>> -----
>> Geen virus gevonden in dit bericht.
>> Gecontroleerd door AVG - www.avg.com
>> Versie: 10.0.1424 / Virusdatabase: 2411/4971 - datum van uitgifte:
>> 05/01/12
>>
>> --
>> _________________________________________________________________
>> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
>> Archives: http://lists.thomasclausen.net/mailman/private/olympus/
>> Themed Olympus Photo Exhibition: http://www.tope.nl/
>>
>>
>
>
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|
