7 replies to this topic

[Mr.Bill]

my first posting

 

I need the battery size for my ortho Celestron 12.5mm ill reticle ocular 1.25".

a CR 1616 will fit in the casing but will not illuminate the reticle.

polarity is correct

I had this eye  piece for about 30 years.

thanks 

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[Rob Clark]

Hi Mr.Bill, I have this same eyepiece -- did you ever figure out which battery(ies) it takes?

I'd be interested to know. 

 

Thanks,

Rob

[T1R2]

Did you try a A14PX or two LR44's stacked and taped together? or maybe the two 357's, I hear they last almost twice as long as the LR44's

Edited by T1R2, 22 September 2024 - 04:01 PM.

[Rob Clark]

No, I will try to grab some tomorrow.

Thanks for the response.

[Michael Covington]

A CR1632 is like a CR1616 but twice as thick.  Is that what you might be needing?

[Rob Clark]

Well, I found this: https://agenaastro.c...ece-12-5mm.html

 

It states, the "illuminator requires three SR-54/LR-44 batteries". 

I couldn't find these at the local dept. store, may have to

order online.   Of course, this is if the specs are the same as my older Celestron unit.

Edited by Rob Clark, 22 September 2024 - 08:03 PM.

[Michael Covington]

LR-44 is very common and so is SR-44 (I think SR-54 is a typo).  Those are the alkaline and silver oxide versions of the same battery.  It is the most common battery for non-motorized film cameras, also known as MS76.   I seem to recall 357 is also equivalent.

 

[jacobfw]

Hi, I'm just curious.  I've seen some writing online which suggests this piece has a grid for angular measurements, however I can't find any definitive confirmation of this, or pictures of what is visible through the eyepiece.

Can anyone confirm what type of reticle this eyepiece has?