WTB AO Spencer 60x Dry Objective Cat#122

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GerryR
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Joined: Sun May 22, 2022 11:44 am
Location: Virginia, USA

WTB AO Spencer 60x Dry Objective Cat#122

#1 Post by GerryR » Thu Jun 23, 2022 3:55 pm

Looking to buy AO Spencer 60x Dry Objective Cat # 122 (infinity corrected) at a reasonable price (only have one arm and leg left!! ;) I'm in USA so prefer sale here to avoid high shipping costs.

apochronaut
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Re: WTB AO Spencer 60x Dry Objective Cat#122

#2 Post by apochronaut » Thu Jun 23, 2022 4:35 pm

Cat. # 122 is a 34mm parfocal objective rated at 60X in it's early incarnations and 57X in later incarnations. It was for a 160mm tube, not infinity. They are not very common. Several of the older 60X I have encountered have suffered from separation in the same element so you can't even make 1 out of 2 of them. There was also a W.I. version of that up until the 2nd W.W. and briefly after that a 60X 1.25 oil achromat.

The only infinity corrected 60X AO or later branded Reichert made was the cat.# 1303, 63X .80 Spl. achro. They did also make a cat.# 1016 34mm parfocal 50X .80 oil w./iris planachro and a cat. # 1758 45mm parfocal 50X .80 oil Neoplan.

Reichert Austria also made a 63X 1.0 45mm parfocal objective in both glycerin immersion and oil immersion. I have not seen a dry 63X 45mm parfocal but it is possible they made one later.

GerryR
Posts: 73
Joined: Sun May 22, 2022 11:44 am
Location: Virginia, USA

Re: WTB AO Spencer 60x Dry Objective Cat#122

#3 Post by GerryR » Thu Jun 23, 2022 7:06 pm

I'm trying to stay away from oil, and the 34mm parfocal infinity objectives are hard to come by, it seems, except for the standard 4x, 10x, 43x/45x, 97x/100x oil. I came across a 20x AO Spencer C80874 but don't know whether it is Infinity corrected. I've tried to search, but no cigar. I appreciate you correcting my misconception of the 122 being infinity corrected. Thank you for the information!

dtsh
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Location: Wisconsin

Re: WTB AO Spencer 60x Dry Objective Cat#122

#4 Post by dtsh » Thu Jun 23, 2022 8:07 pm

AO objectives labelled as C (C=coated) are for 160mm TL systems. Have you considered adding a pair of 15x eyepieces? Your 40x then gets you to 60x.

Edit: There's a 63x 34mm inifinity in this post viewtopic.php?f=16&t=15484

apochronaut
Posts: 5270
Joined: Fri May 15, 2015 12:15 am

Re: WTB AO Spencer 60x Dry Objective Cat#122

#5 Post by apochronaut » Thu Jun 23, 2022 8:30 pm

With the exception of only a few early infinity corrected apochromats that I know of ( 10X .30, 43X .80 and 80X 1.30) the infinity corrected objectives have the catalogue # engraved on the objective barrel. They are rarely 3 numbers and normally 4 numbers. There were rarely serial #'s on the infinity stuff.

Longer #'s and those that begin with a C are serial #'s , which were used on the 160mm objectives but no cat. # was engraved. C for coated.

Have s look at this thread. I should update it because I have a few new entries.

viewtopic.php?f=5&t=5073

GerryR
Posts: 73
Joined: Sun May 22, 2022 11:44 am
Location: Virginia, USA

Re: WTB AO Spencer 60x Dry Objective Cat#122

#6 Post by GerryR » Thu Jun 23, 2022 11:25 pm

dtsh wrote:
Thu Jun 23, 2022 8:07 pm
AO objectives labelled as C (C=coated) are for 160mm TL systems. Have you considered adding a pair of 15x eyepieces? Your 40x then gets you to 60x.

Edit: There's a 63x 34mm inifinity in this post viewtopic.php?f=16&t=15484
Thanks for the link, but too rich for my budget. Hadn't thought about the 15x eyepiece; only need one as only have a monocular 'scope. That's a good option.

GerryR
Posts: 73
Joined: Sun May 22, 2022 11:44 am
Location: Virginia, USA

Re: WTB AO Spencer 60x Dry Objective Cat#122

#7 Post by GerryR » Fri Jun 24, 2022 10:53 am

apochronaut wrote:
Thu Jun 23, 2022 8:30 pm
With the exception of only a few early infinity corrected apochromats that I know of ( 10X .30, 43X .80 and 80X 1.30) the infinity corrected objectives have the catalogue # engraved on the objective barrel. They are rarely 3 numbers and normally 4 numbers. There were rarely serial #'s on the infinity stuff.

Longer #'s and those that begin with a C are serial #'s , which were used on the 160mm objectives but no cat. # was engraved. C for coated.

Have s look at this thread. I should update it because I have a few new entries.

viewtopic.php?f=5&t=5073
That is a very comprehensive list. I've added it to my AO Sixty files, and when you update the list, I'll add them to my files as well. Thank you.

apochronaut
Posts: 5270
Joined: Fri May 15, 2015 12:15 am

Re: WTB AO Spencer 60x Dry Objective Cat#122

#8 Post by apochronaut » Fri Jun 24, 2022 3:16 pm

I added about 5 more to the list just now.

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