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Equipment Discussions >> Refractors

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De Lorme
professor emeritus
*****

Reged: 12/30/08

Re: CA Reduction filters new [Re: coopman]
      #6147575 - 10/19/13 10:45 PM

Since were having such great results with the Longpass and the Moon & Sky Glow has anybody ever tried any filters with any success with the atmosphere? I just had to ask.
Seek and you shall find. You know the rest. De Lorme


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t.r.
Post Laureate
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Reged: 02/14/08

Loc: Upstate NY
Re: CA Reduction filters new [Re: De Lorme]
      #6147960 - 10/20/13 07:23 AM

Dave, if you want to try another filter for planetary, the Salmon 85 does VERY well on Mars and actually does pretty well on Jupiter and Saturn too. If you can get used to that strong yellow longpass, you can get used to the salmon tint. This color looks awlful close to the new TV Planetary Contrast filter. Classic achro users have used this filter for years as well. I got mine from HOO made by Hoya, a 2" for $10 I think. Worth every penny. Vernonscope also has them for Brandons. Out of all my filters, the #8 and #85 aren't going anywhere. I even use this filter with my AP 130 GT on Mars to reduce the glare and enhance maria!

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A. Viegas
scholastic sledgehammer
*****

Reged: 03/05/12

Loc: New York City/ CT
Re: CA Reduction filters new [Re: t.r.]
      #6148027 - 10/20/13 08:50 AM Attachment (35 downloads)

Early this morning as dawn was breaking I took a couple of quick pictures through the Hyperion 5mm eyepiece of Sirius with my Istar R30 150mm F8 --

With Sirius Optical MV 20 CA filter, I think this does a very good job. Granted first time using, but still not too bad.



Al


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De Lorme
professor emeritus
*****

Reged: 12/30/08

Re: CA Reduction filters new [Re: A. Viegas]
      #6148082 - 10/20/13 09:34 AM

Al is the MV 20 any good on the Moon, and Jupiter?
Does it dim the DSO that your looking at?
De Lorme


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A. Viegas
scholastic sledgehammer
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Reged: 03/05/12

Loc: New York City/ CT
Re: CA Reduction filters new [Re: De Lorme]
      #6148126 - 10/20/13 10:08 AM Attachment (24 downloads)

I had literally just 10-20 minutes to test it this morning. I did look at Jupiter but honestly I could not really tell much of a difference, except that the MV20 adds some yellow but does get rid of some of the violet haze. Granted these were single Iphone snaps and it was already dawn and I was a bit sleepy so not great -- nevertheless it is what it is... I am not going to have a chance until next week maybe to test it out some more, and next time will definitely try the moon.

Al


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russell23
Post Laureate
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Reged: 05/31/09

Loc: Upstate NY
Re: CA Reduction filters new [Re: t.r.]
      #6148250 - 10/20/13 11:28 AM

Quote:

Dave, if you want to try another filter for planetary, the Salmon 85 does VERY well on Mars and actually does pretty well on Jupiter and Saturn too. If you can get used to that strong yellow longpass, you can get used to the salmon tint. This color looks awlful close to the new TV Planetary Contrast filter. Classic achro users have used this filter for years as well. I got mine from HOO made by Hoya, a 2" for $10 I think. Worth every penny. Vernonscope also has them for Brandons. Out of all my filters, the #8 and #85 aren't going anywhere. I even use this filter with my AP 130 GT on Mars to reduce the glare and enhance maria!




Good suggestion. It looks like Vernonscope is the place to get an 85 salmon filter. They have a simple adapter that will allow it to thread into standard thread eyepieces.

Dave


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oldtimer
Pooh-Bah
*****

Reged: 11/13/08

Loc: Lake County Illinois
Re: CA Reduction filters new [Re: russell23]
      #6150040 - 10/21/13 03:09 PM

Several folks on this thred have mentioned that people have different tollerances to CA. Of course this is true but it also it is true that differnt aperatures and f ratios will produce different levels of CA.

A Lumicon MV filter with a 495nm cutoff works well with my 80mm F7.5 but I need my Semi Apo or #8 yellow for my 127mm F6.5


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russell23
Post Laureate
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Reged: 05/31/09

Loc: Upstate NY
Re: CA Reduction filters new [Re: oldtimer]
      #6152140 - 10/22/13 06:10 PM Attachment (41 downloads)

A few photos taken with my I-pad with the Vixen140 at 40x using a 20mm ES68. First ... No filter:

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russell23
Post Laureate
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Reged: 05/31/09

Loc: Upstate NY
Re: CA Reduction filters new [Re: russell23]
      #6152144 - 10/22/13 06:10 PM Attachment (34 downloads)

Next with #8 light yellow:

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russell23
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Reged: 05/31/09

Loc: Upstate NY
Re: CA Reduction filters new [Re: russell23]
      #6152147 - 10/22/13 06:11 PM Attachment (40 downloads)

Fringe killer:

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russell23
Post Laureate
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Reged: 05/31/09

Loc: Upstate NY
Re: CA Reduction filters new [Re: russell23]
      #6152149 - 10/22/13 06:12 PM Attachment (43 downloads)

Baader 495 longpass filter:

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t.r.
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Reged: 02/14/08

Loc: Upstate NY
Re: CA Reduction filters new [Re: russell23]
      #6153102 - 10/23/13 08:10 AM

EGADS!!! How do you stand that longpass tint?!?!
I do see how it sharpens things up though.

It looks like I'm gonna have to try the fringe killer. Thanks for the pic comparison...speaks volumes, at least in daylight.


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skywatcher101
super member
*****

Reged: 07/13/10

Re: CA Reduction filters new [Re: t.r.]
      #6153126 - 10/23/13 08:28 AM

Nice comparison between the filters. I have the 495 longpass and I will be getting a yellow #8 sometime soon.

Paul


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skywatcher101
super member
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Reged: 07/13/10

Re: CA Reduction filters new [Re: skywatcher101]
      #6153134 - 10/23/13 08:32 AM

@ressell23, if you have a moon and skyglow filter, can you stack it and show the results?

Paul


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russell23
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Reged: 05/31/09

Loc: Upstate NY
Re: CA Reduction filters new [Re: skywatcher101]
      #6153297 - 10/23/13 10:01 AM

Quote:

@ressell23, if you have a moon and skyglow filter, can you stack it and show the results?

Paul




I'm planning to get an 82A filter to see what that does to reduce the color shift. I don't have he M&SG.

Dave


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Jon_Doh
professor emeritus


Reged: 09/16/11

Loc: On a receiver's back
Re: CA Reduction filters new [Re: russell23]
      #6153317 - 10/23/13 10:08 AM

I like the results the Baader Fringe filter stacked with the Baader Moon and Skyglow gives. CA is removed on all but the brightest objects, color is close to normal and sharpness and contrast are vastly improved. The CA that's left on the brightest objects isn't much more than what you see in the ES triplet and that's acceptable to me.

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russell23
Post Laureate
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Reged: 05/31/09

Loc: Upstate NY
Re: CA Reduction filters new [Re: t.r.]
      #6153330 - 10/23/13 10:16 AM

Quote:

EGADS!!! How do you stand that longpass tint?!?!
I do see how it sharpens things up though.

It looks like I'm gonna have to try the fringe killer. Thanks for the pic comparison...speaks volumes, at least in daylight.




With the longpass filter the moon is yellow and bright stars like Vega are yellow - but a bright golden yellow Vega is a very pretty. The CA with his filter is gone. The improvement in sharpness is very dramatic for deep sky - better than the Fringe Killer. I have some photos at 100x I will post that illustrate how much better the longpass is than the others.

Dave


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russell23
Post Laureate
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Reged: 05/31/09

Loc: Upstate NY
Re: CA Reduction filters new [Re: russell23]
      #6153331 - 10/23/13 10:17 AM Attachment (38 downloads)

Vixen 140 at 100x with no filter:

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russell23
Post Laureate
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Reged: 05/31/09

Loc: Upstate NY
Re: CA Reduction filters new [Re: russell23]
      #6153340 - 10/23/13 10:19 AM Attachment (26 downloads)

With #8 wratten:

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russell23
Post Laureate
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Reged: 05/31/09

Loc: Upstate NY
Re: CA Reduction filters new [Re: russell23]
      #6153358 - 10/23/13 10:26 AM Attachment (33 downloads)

Baader Fringe Killer:

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