15 replies to this topic

[BigC]

I read and searched but not finding.

[ngc7319_20]

Gailand Optical Co

 

Like this?

 

Edited by ngc7319_20, 20 February 2021 - 09:01 PM.

[BigC]

No letters. Just planet with horizontal ring.

[makscopes]

I think Gayloc


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[BigC]

Is Gayloc generally regarded as good or not?

[makscopes]

I have never looked through one, but that being said I have seen others go bonkers trying to get them. I’m not sure if it due to good views or collectible reasoning.


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[ngc7319_20]

Is Gayloc generally regarded as good or not?

 

If there are no letters at all, I'm not sure what it is.  Can you post a photo?

 

Logo pictured above is Gailand Optical Co., sometimes called Galoc.  They are excellent build quality, excellent optics, if you can find them in good condition.  The optical designs are basic ORTHOS and ERFLE-like designs.  Good in slow F-ratio (F/8 and slower) scopes of the day.

[BigC]

Considering a purchase that would duplicate a more common one , and wondering if the quality is worth the cost.

Guess only way to know is buy and test. Too far to go try first. Or maybe just forget it and stick with known goods.

Thanks for replied.

[BigC]

I've spent at least an hour looking at the seller's photos and finally spotted "rea" peeking around the edge of one picture; so Korea not Japan .

 

My apologies for wasting everyone's time.

[JamesMStephens]

I've spent at least an hour looking at the seller's photos and finally spotted "rea" peeking around the edge of one picture; so Korea not Japan .

 

My apologies for wasting everyone's time.

You didn't waste anyone's time.  It seems everyone who responded enjoyed the discussion.

 

Jim

[JamesMStephens]

https://www.cloudyni...-gailand-galoc/

[Terra Nova]

If there are no letters at all, I'm not sure what it is.  Can you post a photo?

 

Logo pictured above is Gailand Optical Co., sometimes called Galoc.  They are excellent build quality, excellent optics, if you can find them in good condition.  The optical designs are basic ORTHOS and ERFLE-like designs.  Good in slow F-ratio (F/8 and slower) scopes of the day.

I had two of them, the 16.3mm that was a sort of Erfle and the one that was in the 11 to 13mm range and was basically an ortho. I sold them along with my Criterion collection when I was pairing down my 1.25” classic eyepieces. They were nice eyepieces. Quite heavy with lovely glass but I found that I preferred my circle T volcano-tops. They were the ones that were getting all the use.

[DAVIDG]

 The Gailoc 16.3mm is unique in that one surface is aspherical. So that surface at the time would most likely have  been hand polished to put  that figure on it. A majority of eyepieces use lens with spherical surfaces since they  are simpler  ie cheaper to manufacture.  So you can replace one lens with an aspherical surface  with a couple of with spherical surfaces to achieve the same correction.  That is what is going on with  a number of the modern SCT that have a group of corrector lenses down in the baffle tube. It eliminates the need for the aspheric secondary and the need to hand figure that surface. So one benefits is that it saves  labor cost in the production of the optics.

 

                    - Dave   

[starman876]

 The Gailoc 16.3mm is unique in that one surface is aspherical. So that surface at the time would most likely have  been hand polished to put  that figure on it. A majority of eyepieces use lens with spherical surfaces since they  are simpler  ie cheaper to manufacture.  So you can replace one lens with an aspherical surface  with a couple of with spherical surfaces to achieve the same correction.  That is what is going on with  a number of the modern SCT that have a group of corrector lenses down in the baffle tube. It eliminates the need for the aspheric secondary and the need to hand figure that surface. So one benefits is that it saves  labor cost in the production of the optics.

 

                    - Dave   

Does it improve on the optical quality?

[Marcus Roman]

Is Gayloc generally regarded as good or not?

I have a Galoc 16.3mm, good and sharp at the centre but close to the field stop I see some astigmatism. Let’s say 60% or so of field is good, but not out of this circle.

Edited by Marcus Roman, 21 February 2021 - 01:27 PM.

[Terra Nova]

I have a Galoc 16.3mm, good and sharp at the centre but close to the field stop I see some astigmatism. Let’s say 60% or so of field is good, but not out of this circle.

I had a similar experience Marcus. I loved the way they looked and felt, but my 20mm Circle-T Erfle and my 18mm and 13.8mm Meade Series 4000 (Japan) SWAs are better performers in my shorter refractors.