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Re: [OM] IMG: Exploring Higher ISO Values

Subject: Re: [OM] IMG: Exploring Higher ISO Values
From: "Jim Nichols" <jhnichols@xxxxxxxxxxxxx>
Date: Tue, 1 May 2012 17:38:50 -0500
Hi Chuck,

Yes, I realize the stop change due to the converter, but it is easier for me 
to just log the actual clicks.  I think my two shots today defined some 
boundaries for me, which was what I set out to do.  I will try to refine 
this.  On the lens, I have 4 clicks from f/4 to f/8, which allows me to stay 
beneath my dark cloth, focus wide open, then stop down.  I suspect f/5.6 or 
f/6.3 will be the final choice.
Thanks for your comments.

Jim Nichols
Tullahoma, TN USA
----- Original Message ----- 
From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Tuesday, May 01, 2012 5:11 PM
Subject: Re: [OM] IMG: Exploring Higher ISO Values


> 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
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>>
>>
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