Here are two samples taken with Zuiko 80mm F4 at F8:
5D II, cropped both edges to make it 4:3 and scale down to 4032x3024 (same
as E-PL1):
http://www.accura.com.hk/IMG_0948c.jpg
Olympus E-PL1
http://www.accura.com.hk/PC193332.jpg
You can see the apparent DOF on the second one looks deeper, it will be more
so with smaller sensor.
C.H.Ling
----- Original Message -----
From: "C.H.Ling" <ch_photo@xxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Sunday, December 19, 2010 1:21 PM
Subject: Re: [OM] Jeweler's camera
> You said it is the focal length not the sensor size cause different DOF,
> so
> consider the same sensor - FF for example. The DOF of 100mm lens at 10
> feet
> is 1.42ft, the DOF of 50mm lens at 5 feet (to get the same mag.) is
> 1.44ft,
> it is almost the same as the 100mm lens.
>
> C.H.Ling
>
> ----- Original Message -----
> From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
>
>
>> That's not what my DOF calculator says. If you can quantify it with a
>> specific example I'll believe it. But I don't think you can. The
>> example I used was a 100mm lens at f/8 focused at 10 feet with a CoC of
>> 30 lines/mm. That yields a DOF of 1.58 feet. Then a 50mm lens at f/8
>> also focused at 10 feet but with a CoC of 60 lines/mm. That's to allow
>> for a smaller image size (sensor) to be blown up twice as much as the
>> 100mm shot such that the final print size (magnification) is the same.
>> The 50mm lens gets a total DOF of 3.28 feet. Slightly more than double.
>>
>> Chuck Norcutt
>>
>> On 12/18/2010 8:32 PM, C.H.Ling wrote:
>>> I do think it is the sensor gives the increased DOF not the lens, for
>>> the
>>> same magnification, a 50mm lens and 100mm lens have the same DOF under
>>> the
>>> same aperture but the one with smaller sensor gives deeper DOF.
>>>
>>> C.H.Ling
>>>
>>> ----- Original Message -----
>>> From: "Chuck Norcutt"<chucknorcutt@xxxxxxxxxxxxxxxx>
>>> To: "Olympus Camera Discussion"<olympus@xxxxxxxxxxxxxxxxx>
>>> Sent: Sunday, December 19, 2010 12:46 AM
>>> Subject: Re: [OM] Jeweler's camera
>>>
>>>
>>>> It's the short focal length that gives the increased depth of field,
>>>> not
>>>> the sensor. But small sensors and short lenses do go together.
>>>>
>>>> Chuck Norcutt
>>>>
>>>>
>>>> On 12/17/2010 11:33 PM, Andrew Fildes wrote:
>>>>> Yes, the compact size sensor on the G12 gives a deeper DOF and I
>>>>> forgot
>>>>> to mention - articulated screen. Don't do macro without one!
>>>>> I'd imagine a tabletop set up with cube. mini-lights and table
>>>>> tripodfd
>>>>> for very small items, all easily repeatable on a budget. I like to put
>>>>> a
>>>>> small box in there and drape it with velvet offcuts for bright
>>>>> jewellry.
>>>>> The cube tents usually come with a drop-down front panel with hole for
>>>>> lens. Good for anything shiny but also for any small and colourful
>>>>> object.
>>>>> Andrew Fildes
>>>>> afildes@xxxxxxxxxxxxx
>>>>>
>>>>>
>>>>>
>>>
>> --
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>
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