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#1
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An achromat is an achromat is a Borg
Hello,
on http://www.sciencecenter.net/hutech/newprod.htm I read "New Achromatic objective - 77Ach Available as an objective tube assembly (6177) or as an SWII system set (0070). This newly-designed achromat, utilizing ECO* glass, features a spot size of less than 10 microns between 630nm and the green region. Both chromatic and spherical aberrations are improved even further compared to the 76Ach. The 77Ach supersedes the 76Ach as Borg's entry-level Series 80 product. " Anybody knows what ECO* glass is and how it is improving correction of standard achromat (and also 101ED) objective ? David |
#2
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An achromat is an achromat is a Borg
'ECO' glass and similar terms are marketing for glass made using less
polluting processes and materials. The term in and of it's self says nothing about performance. Don't know any specifics about the Borg. |
#3
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An achromat is an achromat is a Borg
Or recycled one ?
http://japan.recycle.net/trade/EcoGlass.html Maybe during the recycling the glass was enriched by heavy metals ? I am joking, of course. I remember info on this board that introduction of stricter ecologic rules in the West stopped production of some (for telescope production desirable) kind of optical glass. David Enyo wrote: 'ECO' glass and similar terms are marketing for glass made using less polluting processes and materials. The term in and of it's self says nothing about performance. Don't know any specifics about the Borg. |
#4
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An achromat is an achromat is a Borg
Dear David,
Fluorite glass. best penny (for telescope production desirable) kind of optical glass. |
#5
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An achromat is an achromat is a Borg
Dear Enyo,
Resistance is futile. You will be assimilated. best penny Don't know any specifics about the Borg |
#6
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An achromat is an achromat is a Borg
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#7
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An achromat is an achromat is a Borg
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#8
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An achromat is an achromat is a Borg
Dear Thad,
That's great! Though it would be better if it were from Dislexus of Borg. thanks penny "Your ass will be laminated. -Dyslexic of Borg |
#9
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An achromat is an achromat is a Borg
Dear steve,
Fluorite glass would be a more correct term, but they do say fluoride sometimes. best penny Isn't that fluoride glass, as used in Leica Apo lenses? Same. |
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