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APM 140 Doublet Owners; What Do You Think?

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155 replies to this topic

#51 SteveG

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Posted 26 February 2019 - 05:43 PM

This may have been the case in 1960, but not any more. My AT-102 has numerous light baffles installed in it.

 

...Ralph

 

Also note that all TeleVue refractors still use black felt inside the tube for baffling.



#52 Steve Allison

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Posted 26 February 2019 - 06:22 PM

I never said the use of traditional light baffles was superior to flocking.

 

I was just responding to a poster who wondered about wider tubes and felt that narrower tubes gave up nothing except size and weight.

 

I don't know about 1960, but my Takahashi FS-102NSW made around 2005 has the wider tube with a series of large traditional baffles with diminishing apertures to control stray light. Apparently, Takahashi believed at that time that this was the superior method of improving contrast.

 

I am aware some narrower modern tube assembles sometimes use a series of same-size narrow rings or threads in lieu of traditional baffles, much like those in many draw tubes. I don't know, but maybe this is what Takahashi does with its 95mm tubed 4 inch FC-100D models.

 

Interestingly, my superior quality Royal Astro 90mm F/15.6 refractor uses a 90mm tube but still manages to include traditional-looking light baffles.

 

Steve


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#53 Bomber Bob

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Posted 26 February 2019 - 06:37 PM

I saw with my antique Mogey 3" F13 that a combination of baffling & flocking boosts contrast -- especially lunar & planetary.  The most effective baffle I've ever made was the short cone (based on binoculars) I put in a Tasco 999VR (60mm F5) RFT; and I plan on something similar for my 5" F5 triplet -- you don't have to cut out a series of disks with varying center hole sizes.  Took some tinkering to work out the best taper -- blocking stray light without vignetting -- but it was worth it.

 

FYI:  Even my dinky 40mm & 50mm vintage refractors have baffles in the tiny tubes.


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#54 stryker66

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Posted 27 February 2019 - 11:08 PM

So I got mine today and surprisingly the stellarvue flattener fits the 2.5" focuser. I was wondering if this really works. This thing is a lot bigger than my stellarvue 102. I can't wait to test this and hopefully the stellarvue flattener will work. This is front heavy and I need more weight so I can push it more..

2RSsY.jpg

 

2RSsX.jpg

 

2RSsZ.jpg


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#55 jay.i

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Posted 27 February 2019 - 11:22 PM

OMG. I thought that humidifier in the background of pic 3 was an OLD Apple iMac G3. lol.gif lol.gif

 

IMac_Bondi_Blue.jpg


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#56 stryker66

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Posted 27 February 2019 - 11:25 PM

OMG. I thought that humidifier in the background of pic 3 was an OLD Apple iMac G3. lol.gif lol.gif

 

grin.gif grin.gif grin.gif grin.gif



#57 Doug Culbertson

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Posted 28 February 2019 - 09:44 AM

So I got mine today and surprisingly the stellarvue flattener fits the 2.5" focuser. I was wondering if this really works. This thing is a lot bigger than my stellarvue 102. I can't wait to test this and hopefully the stellarvue flattener will work. This is front heavy and I need more weight so I can push it more..

2RSsY.jpg

 

2RSsX.jpg

 

2RSsZ.jpg

 

Gosh, that’s pretty!  I got a call from Lunt Solar Systems yesterday. Apparently the 140 isn’t in stock, so mine will probably be coming directly from APM. I’m out of town next week, so I asked them to delay shipping; so it won’t come for at least two weeks. 


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#58 Jon_Doh

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Posted 01 March 2019 - 12:03 PM

Check with Outdoor Sports Optics, they're the official APM dealer in the US.


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#59 Doug Culbertson

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Posted 01 March 2019 - 12:14 PM

Lunt checked with them already and there was some issue there. FWIW, when I placed my order, I thought that Lunt was APM’s official dealer. Live and learn. 



#60 stryker66

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Posted 02 March 2019 - 12:13 PM

I just tested and the stellarvue flattener works and focused well, this is front heavy scope so I ordered some weights and will replace the losmandy type rail to a longer one then attach the weight for proper balance since I cant find a pier extension for my mount. it will not clear the tripod if I cant push it further..



#61 stryker66

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Posted 06 March 2019 - 12:44 PM

First light test, 5hrs of LRGB using optolong filters and 2hrs of Crab Nebula using Astrodon 3nm SHO filters. This got potential. Hoping to add more data. I use ZWO 1600mm @ 5min exposures for the Whirpool and 10min for the Crab Nebula. I also ordered the QHY 178M Mono I can magnify better @ 6MP resolution. I also added about 7lbs of weight to the rear for proper balance otherwise it wont clear my tripod.

 

2S6yf.jpg

 

2S6yg.jpg

 

 

2S6yA.jpg


Edited by stryker66, 06 March 2019 - 12:51 PM.

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#62 evan9162

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Posted 06 March 2019 - 08:50 PM

I also started shooting M1 with my '140.

 

I've only gotten 1 hour of H-a so far, but it looks pretty good

TS 0.79x reducer, ASI178mm-c, Astronomik 6nm H-a filter, 6x600s

 

 

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#63 HydrogenAlpha

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Posted 08 March 2019 - 02:06 AM

Very nice images, Darin and Rey! The resolving power of the scope is incredible. 



#64 stryker66

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Posted 08 March 2019 - 10:16 PM

I just acquire QHY178M mono and it perfectly fit the ZWO filterwheel and focus is the same. for some reason the ASI178M is listed as discontinued so I tried the QHY178M which has the same sensor. I simulate the FOV and exactly what Evan have above so I will be testing this with astrodon filters.



#65 APO1

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Posted 08 March 2019 - 11:12 PM

I've enjoyed my versatile APM 140 for a couple of years now. Pairs up well with a Mewlon 210. Best of both worlds. You can't go wrong.
Clear Skies some day.rain rain go away....
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#66 Doug Culbertson

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Posted 09 March 2019 - 09:49 AM

I've enjoyed my versatile APM 140 for a couple of years now. Pairs up well with a Mewlon 210. Best of both worlds. You can't go wrong.
Clear Skies some day.rain rain go away....

Since ordering the APM 140 I’ve been thinking that a Mewlon 210 would make an excellent companion on the AYO Digi II mount. I was right on the verge of ordering one when a 14.5” Starmaster came up for sale nearby, so I bought that instead.

 

 I could still see myself with a Mewlon 210 eventually though. 



#67 APO1

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Posted 09 March 2019 - 10:37 PM

Man, a 14 inch Starmaster, more than the best of both worlds, enjoy!
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#68 evan9162

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Posted 12 March 2019 - 08:58 PM

Captured enough for a usable image

APM140, TS 0.79x, ASI178mm

H-a: 17x600s

O(III): 14x600s

 

M1_Ha_O3_A140_p_sm.jpg


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#69 Doug Culbertson

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Posted 15 March 2019 - 09:42 AM

Mine just arrived in apparent excellent condition. Now all I have to wait for is the AYO Digi II mount and clear skies. 

 

 

 

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#70 rkelley8493

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Posted 15 March 2019 - 10:00 AM

Mine just arrived in apparent excellent condition. Now all I have to wait for is the AYO Digi II mount and clear skies. 

Nice! I just decided on the APM 140 as my first refractor. Looking to purchase next week. That's a good looking scope!


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#71 Doug Culbertson

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Posted 15 March 2019 - 10:02 AM

That’s a nice first refractor! Congrats, be sure to post photos. 


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#72 NHRob

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Posted 15 March 2019 - 05:39 PM

Looks sweet Doug.
How much does it weigh?

#73 junomike

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Posted 15 March 2019 - 05:50 PM

Mine just arrived in apparent excellent condition. Now all I have to wait for is the AYO Digi II mount and clear skies. 

What Tripod you putting the AYO on?

You might need an extension to avoid contact (Diagonal) when/if viewing near Zenith.


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#74 Doug Culbertson

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Posted 15 March 2019 - 05:53 PM

Thanks Rob! It weighs around 20 pounds, but it feels lighter to me than my previously owned AT130EDT. 



#75 Doug Culbertson

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Posted 15 March 2019 - 06:00 PM

Mike, the AYO is going on a Berlebach Planet. I asked Beat Kohler about the extension that he offers and his reply was that, based on his 6” apo, the diagonal was likely to hit the tripod either way, so it’s best to just wait a half hour until the object at zenith passes zenith. I’m going to wait and see, but I might have to do the alt reference on the Nexus sans the scope, then do the alignment after I put the scope on the mount. 




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