Archived posting to the Leica Users Group, 2014/10/12

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Subject: [Leica] Unexpected camera limitation
From: Frank.Dernie at btinternet.com (Frank Dernie)
Date: Sun, 12 Oct 2014 09:41:22 +0100
References: <ADC88CED-289F-4421-8A3A-E07E62E0AECC@acm.org> <737A5612-C5D5-40FD-A821-D39ECFC02A94@btinternet.com> <5F699E28-5E38-405C-94E7-185DD16475C9@acm.org>

Yep, that is a so called APS sized sensor with all the benefits and 
shortcomings which go along with it :)
Frank D

On 11 Oct, 2014, at 18:04, Herbert Kanner <kanner at acm.org> wrote:

> I just checked the specs of my X100S, which has a 23.6 x 15.6 mm sensor 
> and a focal length of 23 mm. It has an  f/2 lens which stops down to f/16.
> 
> Unfortunately, it is now out of my hands for warrantee repair.
> 
> Herbert Kanner
> kanner at acm.org
> 650-326-8204
> 
> Question authority and the authorities will question you.
> 
> 
> 
> 
> On Oct 10, 2014, at 9:52 PM, Frank Dernie <Frank.Dernie at btinternet.com> 
> wrote:
> 
>> The depth of field and onset of diffraction limit for sharpness is 
>> completely different in small sensor cameras than those of 35mm. Very 
>> few, if any, of these small sensor cameras stop down less than f8 since 
>> the loss of sharpness due to diffraction is significant and the increase 
>> in DoF unnecessary.
>> They didn't think of the type of thing you were trying to do, I suppose, 
>> or making such a small aperture accurate (f16 on a 5mm fl lens is 0.012") 
>> is not economically feasible.
>> 
>> Frank D.
>> 
>> On 10 Oct, 2014, at 23:34, Herbert Kanner <kanner at acm.org> wrote:
>> 
>>> I just ran into a totally unexpected limitation of my Panasonic DMC-LX5, 
>>> A camera which retailed new for $400, or with Leica brand, cosmetics, 
>>> and firmware, $800. I was trying to photograph a small decorative 
>>> waterfall, set the shutter to 1/15 to fuzz up the water, and picked the 
>>> lowest ISO available: ISO 80. Then I discovered that the camera simply 
>>> would not stop down below f/8, giving an impossible over exposure. Would 
>>> I have bought the camera had I known this?I wonder. 
>>> 
>>> I did get it at half the new price, so I suppose it?s better than 
>>> anything I could get new for $200.
>>> 
>>> Herbert Kanner
>>> kanner at acm.org
>>> 650-326-8204
>>> 
>>> Question authority and the authorities will question you.
>>> 
>>> 
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> Leica Users Group.
>>> See http://leica-users.org/mailman/listinfo/lug for more information
>> 
>> 
>> _______________________________________________
>> Leica Users Group.
>> See http://leica-users.org/mailman/listinfo/lug for more information
>> 
> 
> 
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information



In reply to: Message from kanner at acm.org (Herbert Kanner) ([Leica] Unexpected camera limitation)
Message from Frank.Dernie at btinternet.com (Frank Dernie) ([Leica] Unexpected camera limitation)
Message from kanner at acm.org (Herbert Kanner) ([Leica] Unexpected camera limitation)