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Re: [OM] Standard lens focal lengths, was: Nathan's PAD 26/1/2012: boke

Subject: Re: [OM] Standard lens focal lengths, was: Nathan's PAD 26/1/2012: bokeh and high ISO
From: "Jim Nichols" <jhnichols@xxxxxxxxxxxxx>
Date: Fri, 27 Jan 2012 11:41:46 -0600
Hi Chuck,

I often use the ZD 35 Macro on my E-1, and it seems just fine.  That is the 
first "70mm" I have owned since I sold my Leitz 73mm f/1.9 Hektor from the 
1930s.

Jim Nichols
Tullahoma, TN USA
----- Original Message ----- 
From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Friday, January 27, 2012 5:12 AM
Subject: [OM] Standard lens focal lengths, was: Nathan's PAD 26/1/2012: 
bokeh and high ISO


> I've always considered the omission of prime lenses of about 70mm focal
> length a bit of an oddity in 35mm photography.  If we consider 50mm the
> de-facto standard and we wanted to build a set of primes that doubled or
> halved the image area at each step we'd choose a set with:
> 17,5mm, 25mm, 35mm, 50mm, 70mm, 100mm, 140mm, 200mm, 280mm, 400mm.
>
> Typical prime lens availability options from the manufacturers usually
> come pretty close to this set except for the 70mm option.  Instead of
> 70mm we jump to the portrait or macro range of 85-90mm.  How come?  Why
> the hole in angular coverage of primes?  There's another oddity in that
> the next most common lens down from 35mm is 28mm and not 24/25mm.  But I
> think that's a manufacturing price break thing as well as a
> consideration for limiting distortion.
>
> Of course, some would say that the standard lens should be 43mm and not
> 50mm which would place the next focal length up the scale at 60mm but
> that's a different story.
>
> Chuck Norcutt
>
>
> On 1/27/2012 12:48 AM, Chris Barker wrote:
>> That works well, Nathan.
>>
>> But apart from the low light performance, what other use is there for
>> a lens with the efl of around 65mm?  I would love to have an excuse
>> to save up for one :-)
>>
>> Chris
>>
>> On 26 Jan 2012, at 22:09, Nathan Wajsman wrote:
>>
>>> We had our monthly wine tasting at the office this evening, which
>>> provided a good opportunity to show off my 1.9/43mm Pentax lens
>>> wide open:
>>>
>>> http://www.greatpix.eu/All/Picture-A-Day/4253606_kdsZ6C#!i=1687409995&k=FMxHGG5&lb=1&s=O
>>>
>>>
> http://www.greatpix.eu/All/Picture-A-Day/4253606_kdsZ6C#!i=1687410074&k=W8W7cR7&lb=1&s=O
>>>
>>> I find its bokeh quite pleasing, and the performance of the K5 at
>>> ISO 6400 is much better than my other camera's ;-)
>>
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