AP 6" F12 NASA Triplet Happy ending
Posted 16 January 2014 - 03:39 AM
It actually performed very nicely but I had to try and get this back to its former glory, after enquiring directly with AP initially it seemed it may be too old or too damaged to be an economic repair. Eventually Roland saw a post I made and said I should contact them.
I received a repair number a few days later and shipped the lens next day FEDEX to the USA (FEDEX lost my lens for a nervewracking 24 hours ).
Anyway it did arrive there safely in the expert hands of AP in March 2013, I enquired as to the status on a few occassions but they were understandibly reluctant to update me until it was evaluated. I decided then to just leave it in the lap of the gods and wait....yesterday out of the blue Daleen from AP telephoned me saying "your lens is fixed and we can ship Today"!
Well to say it is the best late Xmas present ever would be an understatement!
It is expected back here in England tomorrow, the repair sheet says - "Re-polished front and rear elements and refigured. Lens tests very good with sharp star image and good color correction."
I can say without reserve that AP have gone the extra mile in not only taking on a vintage lens for repair but one that had been poorly treated too, it just goes to prove just how they stand behind their fine products even decades after manufacture - there was simply nobody else who I would have let near this lens....
Posted 16 January 2014 - 03:48 AM
Enjoy it now!
Posted 16 January 2014 - 10:28 AM
Atrophysics is Top Notch, Glad to hear the great news..
Posted 16 January 2014 - 02:44 PM
Posted 25 January 2014 - 03:32 AM
Now to restore the tube / focuser and rings as close to original as possible to do this fine optic justice...
Posted 12 February 2014 - 05:40 AM
Focuser from AP is stuck in customs but should clear in the next day or two, Swiss AYO mount due in 3 weeks, rings from parallax due in 3 weeks - then Mark from Moonraker is putting the tube and cells together for me.
Pictures of all the parts to follow then some of the end result.
Posted 12 February 2014 - 06:56 AM
Are you restoring the tube to the original homemade model, or are you recreating the Astro-Physics version of the era?
Posted 17 February 2014 - 02:52 AM
For those interested the NASA thing has always been a subjective point, yes it was better than the flints of the time but I finally found a statement by AP from 1981 which cleared things up for me and also pleased me as the history of the glass goes back to the 60's!
"The secret of the high resolution, contrast and high light gathering power is in the use of three carefully selected glasses made by an American manufacturer in the late '60's for the space program. With respect to light transmission, homogeneity, striations and stress birefringence, it is some of the finest glass ever produced in the history of glass making."
By the way - the only other complete run of cemented Christen triplets it seems are the Vernonscope Brandon 94 Apo's = I want one!
Posted 17 February 2014 - 06:18 AM
Posted 17 February 2014 - 06:19 AM
Posted 17 February 2014 - 11:36 AM
I got that info from AP when I needed a touch up for the edge of my dew shield on my 1995 130f8 Starfire EDT.
Posted 17 February 2014 - 05:12 PM
Posted 17 February 2014 - 05:39 PM
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