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Equipment Discussions >> Equipment

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junomike
Carpal Tunnel
*****

Reged: 09/07/09

Loc: Ontario
Lumicon Premium + vs. Newer Lumicon? new
      #5139365 - 03/24/12 06:39 PM Attachment (33 downloads)

Has the Lumicon Filters changed any in regards to the Transmission %? I have an older "Premium +" OIII and I'm wondering If the newer (non-rated) version is going to be better? Worse? The same?
Also, when did Lumicon do away with the Percentage Ratings?

Mike


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John K
Carpal Tunnel


Reged: 12/26/05

Loc: Vernon BC Canada
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: junomike]
      #5139400 - 03/24/12 07:10 PM

My new ones that don't say premium have higher transmission ratings.

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nevy
professor emeritus
*****

Reged: 02/07/12

Loc: UK
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: John K]
      #5139423 - 03/24/12 07:21 PM

Quote:

My new ones that don't say premium have higher transmission ratings.



So does mine , the best views I had of the veil was through the premium in a 13 mm eyepiece , ( loads of fine filaments) my 2" non premium has higher transmission figures I have not tested it at high power yet , I'm waiting for Cygnus to come round to try it


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PJ Anway
Double-Star Observer
*****

Reged: 06/04/03

Loc: North Coast
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: junomike]
      #5139458 - 03/24/12 07:42 PM Attachment (35 downloads)

Here is the case for my OIII purchased in 1990:

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junomike
Carpal Tunnel
*****

Reged: 09/07/09

Loc: Ontario
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: John K]
      #5139479 - 03/24/12 07:51 PM

Quote:

My new ones that don't say premium have higher transmission ratings.




So then they (Lumicon) still mark them with % ratings?


Mike


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John K
Carpal Tunnel


Reged: 12/26/05

Loc: Vernon BC Canada
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: junomike]
      #5139659 - 03/24/12 10:39 PM Attachment (35 downloads)

Here is a shot of my 2" O-III from last December.

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

Reged: 06/24/03

Loc: Los Angeles
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: junomike]
      #5139899 - 03/25/12 01:45 AM

Lumicon has not done away with the testing of each filter, and earlier O-III filters transmitted red as well as the O-III wavelengths--new ones don't.
Newer filters usually have higher transmissions also.


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nevy
professor emeritus
*****

Reged: 02/07/12

Loc: UK
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: Starman1]
      #5140085 - 03/25/12 08:14 AM

Here is a photo of mine,
http://i1172.photobucket.com/albums/r563/nev19/image.jpg

Edited by nevy (03/25/12 10:00 AM)


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junomike
Carpal Tunnel
*****

Reged: 09/07/09

Loc: Ontario
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: Starman1]
      #5140347 - 03/25/12 11:45 AM

Excellent answers guys! I'm quite pleased to hear they still test each Filter and label the results.

So with the absence of "Red", but slightly higher Transmission percentages, would there be a big difference between the older Premium + and the newer Lumicon?

Mike


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

Reged: 06/24/03

Loc: Los Angeles
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: junomike]
      #5140404 - 03/25/12 12:18 PM

Not in the useful bandwidth. But here is one caveat:
In the daytime, look through the filter with the bright sky in the background. If you see what appears to be a roughly circular stain near the outer edge of the filter, this could indicate a failure of the coatings.
This happened on some of the filters from before 2001.
It doesn't seem to affect the center of the field, but the edges become more questionable.


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junomike
Carpal Tunnel
*****

Reged: 09/07/09

Loc: Ontario
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: Starman1]
      #5144106 - 03/27/12 03:03 PM

Don, I checked and my OIII P+ has consistent uniform coatings from center to edge. Guess the difference wouldn't be worth the cost to upgrade?

Mike


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

Reged: 06/24/03

Loc: Los Angeles
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: junomike]
      #5144359 - 03/27/12 05:29 PM

Nah. Use it till it dies.

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jsiska
professor emeritus
*****

Reged: 07/12/06

Loc: NW Ohio
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: Starman1]
      #5145784 - 03/28/12 04:51 PM Attachment (15 downloads)

Here is a photo of my O-III case showing the Nebula Line Transmission. The Lumicon invoice date for this filter was 07/01/94.

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David Knisely
Postmaster
*****

Reged: 04/19/04

Loc: southeastern Nebraska
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: junomike]
      #5145834 - 03/28/12 05:34 PM Attachment (14 downloads)

First, a little history. When Lumicon first started marketing filters way back in the early 1980's, they had two quality levels: regular and Premium. The premium units were sort of "the pick of the litter", as they tended to have slightly higher maximum transmission levels and a bit more consistent passband locations than the regular filters did. Eventually, the demand for the premium units and better quality control contributed to a phase out of offering the regular units, although some may still have been offered as "seconds". Lumicon went out of business in 2002, but was resurrected by Parks, and the two-tier quality system for filters never has resurfaced. I still have my old "premium" 1.25" set of Deep-sky, UHC, OIII, and H-Beta filters, and their transmission characteristics are pretty close to those that I see in my newer 2" models. The only exception is my 1986 vintage 1.25" Lumicon premium OIII filter, as it has a "red leak" secondary passband that my much newer Lumicon 2" OIII does not. Clear skies to you.

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junomike
Carpal Tunnel
*****

Reged: 09/07/09

Loc: Ontario
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: David Knisely]
      #5145856 - 03/28/12 05:48 PM

Thanks for the history lesson - very Interesting!

Mike


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jsiska
professor emeritus
*****

Reged: 07/12/06

Loc: NW Ohio
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: junomike]
      #5145912 - 03/28/12 06:32 PM

David,

Thank you.


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mclewis1
Thread Killer
*****

Reged: 02/25/06

Loc: New Brunswick, Canada
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: jsiska]
      #5146254 - 03/28/12 10:41 PM Attachment (13 downloads)

2003 era Lumicon filters, Deep Sky on the left, OIII on the right.

Edited by mclewis1 (03/29/12 12:07 PM)


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

Reged: 06/24/03

Loc: Los Angeles
Re: Lumicon Premium + vs. Newer Lumicon? [Re: mclewis1]
      #5146422 - 03/29/12 01:16 AM

Quote:

2005 era Lumicon filters, Deep Sky on the left, OIII on the right.



The one on the right is a UHC filter. The O-III has no H-Beta transmission.


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mclewis1
Thread Killer
*****

Reged: 02/25/06

Loc: New Brunswick, Canada
Re: Lumicon Premium + vs. Newer Lumicon? new [Re: Starman1]
      #5147013 - 03/29/12 12:07 PM

Don,

Thanks, That's what I always thought ... but take a look at the silver labels. I'm guessing this is a labeling or packaging error (putting an OIII label on a box containing a UHC filter and report).

At the time of the purchase I didn't know any better, but later on I thought that this particular OIII filter performed "strangely" (didn't seem to highlight planetaries the way I thought it should using the blinking method), but I just chalked it up to the transition era Lumicon filters. In checking my receipts I also found that the two filters shown above were actually purchased in 2003, not 2005. They were purchased directly from the Lumicon ecom website.

I also have a Lumicon 2" OIII filter purchased in 2007 around here, and one of these days I'm going to compare it with the older one. This newer filter performs as I would expect an OIII to, it's also the one I have the most experience with.

Edited by mclewis1 (03/29/12 12:17 PM)


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