(meteorobs) Off-topic lens data wanted.

[Ed Majden]

Larry:
	From what I dug up on the internet this lens has a flat field and  
was used for Aerial Photography.  Being a multi-element lens,  
transmission is limited to above 400 nm plus to about 700 nm.  I'm  
not sure what format it will cover.  It has been adapted to a  
Polaroid Film back which makes this pretty much useless as Polaroid  
does not make this type of film anymore. Like you, I bought some  
surplus fast lenses, Rayxar type, used for X-ray imaging.  The focus  
point is immediately behind the rear element.  I now use them as  
paper weights, ha! ha! Also have a 155-mm mirror lens that is used  
for night vision systems.  Got one before this silly export  
restriction was put on by the U.S. government along with the export  
of image intensifiers.  I can't get it to focus out the back so its  
another paper weight.  The Kodak aero Ektar lenses are very good for  
meteor work along with the British Pentac lenses.  I use them for  
spectroscopy.  The fellow selling this Super Farron has a buy now  
price of $499 USD or there about's.  I placed a low ball bid on it  
which he rejected.  I think I will pass on this lens as I can't seem  
to find any detailed data on it.  No one seem to know anything about  
it, at least so far.  I don't need another paper weight!
Ed


On 8-Dec-09, at 8:08 PM, Larry wrote:

> Ed,
>
> Some caution is suggested here. If this is a second hand item  
> similar to
> what I messed with before, which was a 6-7 inch American made WWII  
> Aerial
> Camera lens & cell.... I found that those lenses needed a separate  
> screw-on
> cell containing a CORRECTOR lens in order to compensate for serious  
> field
> curvature and to give a flat picture of ground terrain.
>
> Finding both of the matching cells could be a problem. I was never  
> able to
> find the vintage matching cell and later discarded it and the idea  
> of making
> a wide field film camera.
>
> Larry
> YCSentinel
> Subject: (meteorobs) Off-topic lens data wanted.
>
>
>> Rascals:
>> Anyone know anything about this lens:  Super Farron 76 mm f / 0.87
>> of the Farrand Optical Corp. i.e. format, back focus, image quality,
>> etc.  It was used on military aero cameras.
>> I checked with "google" but there is little info on this lens.
>> Thanks:
>> Ed