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Equipment Discussions >> Eyepieces

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Tom886
member


Reged: 08/28/12

Re: 2014 Buyer's Guide to Eyepieces new [Re: cpper]
      #6620897 - 07/07/14 05:28 AM

Was waiting for that, your 2013 guide was already very helpful for me.
However, is it only me who has in Column M only #Value?
Column N and O are just references to =N1 =N2, so somehow there is nothing.
This results in Column P,Q,R in non existent values.

CS
Tom


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Kutno
Pooh-Bah
*****

Reged: 08/17/09

Re: 2014 Buyer's Guide to Eyepieces new [Re: Starman1]
      #6620955 - 07/07/14 07:25 AM

Thank you, Don, for your useful guide and for the very fine contributions you make to the forum.

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Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re: 2014 Buyer's Guide to Eyepieces new [Re: Tom886]
      #6621375 - 07/07/14 12:20 PM

Quote:

Was waiting for that, your 2013 guide was already very helpful for me.
However, is it only me who has in Column M only #Value?
Column N and O are just references to =N1 =N2, so somehow there is nothing.
This results in Column P,Q,R in non existent values.

CS
Tom



Column M and P and R fill in when you enter your telescope's focal length in N1 and hit enter.
Column Q fills in when you enter your scope's f/ratio in O1 and hit enter.


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MPD
member


Reged: 11/14/13

Re: 2014 Buyer's Guide to Eyepieces new [Re: Starman1]
      #6621498 - 07/07/14 01:10 PM

I should have the searchable web-version of this ready by the weekend. I have a proof of concept working with the 2013 data, and just need to import the new data and test.

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jjack's
super member


Reged: 04/01/12

Loc: normandy
Re: 2014 Buyer's Guide to Eyepieces *DELETED* [Re: MPD]
      #6621987 - 07/07/14 06:05 PM

Post deleted by jjack's

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cpper
sage


Reged: 05/23/13

Loc: Romania
Re: 2014 Buyer's Guide to Eyepieces new [Re: jjack's]
      #6623799 - 07/08/14 04:42 PM

Couldn't this get pinned ?

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Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re: 2014 Buyer's Guide to Eyepieces new [Re: cpper]
      #6623871 - 07/08/14 05:40 PM

Quote:

Couldn't this get pinned ?



It already is: See "The Best of Eyepieces Forum" at the top of the Eyepiece Forum home page.


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cpper
sage


Reged: 05/23/13

Loc: Romania
Re: 2014 Buyer's Guide to Eyepieces new [Re: Starman1]
      #6623925 - 07/08/14 06:08 PM

Oops, missed that, sorry.

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hamdul
professor emeritus
*****

Reged: 06/23/09

Loc: Litchfield NH, USA
Re: 2014 Buyer's Guide to Eyepieces new [Re: cpper]
      #6624433 - 07/08/14 11:33 PM

Don,
Another question,
Under Coatings you have several initials, FC, FMC, MC, C, & 58. What do these mean?
Fred


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Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re: 2014 Buyer's Guide to Eyepieces new [Re: hamdul]
      #6625727 - 07/09/14 07:01 PM

C=Coated. Means one or more lenses have anti-reflection coatings on one or more surfaces.

FC=Fully Coated: All lenses have anti-reflection coatings.

MC=Multi-coated: means one or more lenses have an anti-reflection multi-coating applied to one or more surfaces

FMC=Fully Multi-coated: means all lenses have multi-coatings on all surfaces

?=Manufacturer didn't say what coatings are there.

There is another FMC level, often referred to as "index of refraction specific broadband anti-reflection coatings" which is the best. Most manufacturers use a proprietary name for this type of coating (e.g. Pentax SMC). Just because a model is FMC doesn't mean it has these coatings.


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Tom886
member


Reged: 08/28/12

Re: 2014 Buyer's Guide to Eyepieces new [Re: Starman1]
      #6625950 - 07/09/14 09:40 PM

Quote:


Column M and P and R fill in when you enter your telescope's focal length in N1 and hit enter.
Column Q fills in when you enter your scope's f/ratio in O1 and hit enter.



This is awesome, thanks for pointing that out

CS
Tom


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Starman27
Post Laureate
*****

Reged: 01/29/06

Loc: Illinois, Iowa
Re: 2014 Buyer's Guide to Eyepieces new [Re: cpper]
      #6628017 - 07/11/14 11:55 AM

Excellent!

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DougColeman
member


Reged: 06/14/14

Loc: Central Pennsylvania
Re: 2014 Buyer's Guide to Eyepieces new [Re: Starman27]
      #6628554 - 07/11/14 04:41 PM

This is epic. Way to go! Much appreciated!

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ransanjaya
member
*****

Reged: 11/12/13

Re: 2014 Buyer's Guide to Eyepieces new [Re: cpper]
      #6629596 - 07/12/14 10:20 AM

Thank you very much. You are our eyepiece guru.....!

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Busguy
member


Reged: 06/14/07

Loc: Kentucky
Re: 2014 Buyer's Guide to Eyepieces new [Re: ransanjaya]
      #6631201 - 07/13/14 11:33 AM

Thank you, Don. You have provided such valuable information over the years. Awesome.
Joe


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gnowellsct
Postmaster
*****

Reged: 06/24/09

Re: 2014 Buyer's Guide to Eyepieces new [Re: azure1961p]
      #6633770 - 07/14/14 07:44 PM

Quote:

Thanks Don. Those two pair of BCO I bought from you some time ago are doing wonderfully . You ought to honestly write a book on eyepieces, the history, the present, the future, how, why and what etc, if even just in ebooks.

Pete




Chris Lord did that it goes up to about 1990. I don't know how well it stands up among eyepiece experts. But it is highly detailed. GN


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Dave Bush
professor emeritus
*****

Reged: 07/28/04

Re: 2014 Buyer's Guide to Eyepieces new [Re: Starman1]
      #6633889 - 07/14/14 09:04 PM

Quote:

C=Coated. Means one or more lenses have anti-reflection coatings on one or more surfaces.

FC=Fully Coated: All lenses have anti-reflection coatings.

MC=Multi-coated: means one or more lenses have an anti-reflection multi-coating applied to one or more surfaces

FMC=Fully Multi-coated: means all lenses have multi-coatings on all surfaces

?=Manufacturer didn't say what coatings are there.

There is another FMC level, often referred to as "index of refraction specific broadband anti-reflection coatings" which is the best. Most manufacturers use a proprietary name for this type of coating (e.g. Pentax SMC). Just because a model is FMC doesn't mean it has these coatings.




Where does Baader's "Phantom Coating Group" fit in?


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photiost
scholastic sledgehammer
*****

Reged: 12/14/06

Loc: Montreal, Canada
Re: 2014 Buyer's Guide to Eyepieces new [Re: Dave Bush]
      #6634045 - 07/14/14 10:50 PM

Great job Don.

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Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re: 2014 Buyer's Guide to Eyepieces new [Re: Dave Bush]
      #6634111 - 07/14/14 11:36 PM

Quote:

Quote:

C=Coated. Means one or more lenses have anti-reflection coatings on one or more surfaces.

FC=Fully Coated: All lenses have anti-reflection coatings.

MC=Multi-coated: means one or more lenses have an anti-reflection multi-coating applied to one or more surfaces

FMC=Fully Multi-coated: means all lenses have multi-coatings on all surfaces

?=Manufacturer didn't say what coatings are there.

There is another FMC level, often referred to as "index of refraction specific broadband anti-reflection coatings" which is the best. Most manufacturers use a proprietary name for this type of coating (e.g. Pentax SMC). Just because a model is FMC doesn't mean it has these coatings.




Where does Baader's "Phantom Coating Group" fit in?



Their proprietary name for the last group.


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Dave Bush
professor emeritus
*****

Reged: 07/28/04

Re: 2014 Buyer's Guide to Eyepieces new [Re: Starman1]
      #6634204 - 07/15/14 01:17 AM

Quote:

Quote:

Quote:

C=Coated. Means one or more lenses have anti-reflection coatings on one or more surfaces.

FC=Fully Coated: All lenses have anti-reflection coatings.

MC=Multi-coated: means one or more lenses have an anti-reflection multi-coating applied to one or more surfaces

FMC=Fully Multi-coated: means all lenses have multi-coatings on all surfaces

?=Manufacturer didn't say what coatings are there.

There is another FMC level, often referred to as "index of refraction specific broadband anti-reflection coatings" which is the best. Most manufacturers use a proprietary name for this type of coating (e.g. Pentax SMC). Just because a model is FMC doesn't mean it has these coatings.




Where does Baader's "Phantom Coating Group" fit in?



Their proprietary name for the last group.




So it's the "index of refraction specific broadband anti-reflection coatings" or did you mean it's FMC?


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