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New APM 180 mm f/6 FPL51 Semi-APO refractor

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#1 TONGKW

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Posted 26 April 2007 - 10:27 AM

New APM 180 mm f/6 FPL51 Semi-APO refractor
Here is a new refractor with an aperture larger than the usual 6 inch and now on offer at US$7990 with an estimated delivery time of 4 months. It is interesting to note that even with a FPL51 glass element, APM calls it semi-APO. See this link
http://www.astromart...ified_id=496698

Regards
K W TONG
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C8 + CG-5GT, TSA102 + HEQ5, MK67 + Kenko NES, NexStar 6SE, WO ZS 80FD + Mizar K mount, C5, Mini Borg 50, PST

#2 Clive Gibbons

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Posted 26 April 2007 - 10:43 AM

That's cool and very impressive. :ubetcha:

If I was considering an ED doublet of that aperture, a used Meade 178ED (f/9) might be more tempting, especially at the prices they usually go for. But, it would be a much longer animal.

F/6 makes the APM more portable...

Good thing I'm not in the market for either! :lol:

#3 pollux

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Posted 26 April 2007 - 10:58 AM

Scott is unusually quiet. I wonder....

#4 BluewaterObserva

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Posted 26 April 2007 - 11:25 AM

I have to admit, for the aperture and cost, those spot diagrams looks real good. That is pretty close to what can be achieved by a Chromacor I on a 6" F/8 achro.

#5 Scott Beith

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Posted 26 April 2007 - 11:56 AM

Scott is unusually quiet. I wonder....


I am pretty much out of the market at this time. ;)

#6 galaxyman

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Posted 26 April 2007 - 12:06 PM

There is a review coming soon of the TMB/APM 7.1" f/6 achro.

All as I can say at this time about this scope is WOW!


Karl
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12.5" F/4.8 Dob
8" F/9 Refractor (The Beast)
6" F/6.5 Refractor (Mini-Beast)

#7 mizar_80

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Posted 26 April 2007 - 12:07 PM

I could be wrong. But for $8k, I would take a 6" triplet APO any day.

Rick

#8 galaxyman

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Posted 26 April 2007 - 01:07 PM

Rick

I am talking about the 180mm f/6 achro for a little over $3k.

I'll take this scope over either for the price.


Karl
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#9 Clive Gibbons

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Posted 26 April 2007 - 01:12 PM

There is a review coming soon of the TMB/APM 7.1" f/6 achro.

All as I can say at this time about this scope is WOW!


Karl
E.O.H.
R.A.C.


I saw the spot diagram for that lens which Markus included in his ad, and said the same thing! :grin:

#10 galaxyman

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Posted 26 April 2007 - 02:05 PM

There is a review coming soon of the TMB/APM 7.1" f/6 achro.

All as I can say at this time about this scope is WOW!


Karl
E.O.H.
R.A.C.


I saw the spot diagram for that lens which Markus included in his ad, and said the same thing! :grin:


Clive

This is from my post on the Yahoo group refractor forum:

The owner is in my club, and this past Saturday night I had my first chance to look through it. WOW!

The contrast and clarity is extraordinary. It handled power from 36x to 360x. By far the best wide-field views I've seen. Period!

The views of the Veil, Lagoon/Trifid, Omega, and Eagle nebulas, are still imprinted on my mind.

Showed detail in many galaxies (spiral in M-51), and globs were resolved into tiny pinpoints on black velvet.

My 6" Antares refractor (a very good scope) could not keep up with this larger, higher end refractor.

It even impressed a "dob only" guy in our club, who had his 20" Obsession next to the big refractor.


This is my take on the one night with the scope. I'll let the owner of this fine instrument do his review.

Of course both of us (and others) who have seen through these large achros ( his 7.1" and my 8") will be at NEAF all day Saturday, and would be glad to talk to anybody about these fine telescopes :)


Karl
E.O.H.
R.A.C.

22" F/4.5 Dob
12.5" F/4.8 Dob
8" F/9 Refractor (The Beast)
6" F/6.5 Refractor (Mini-Beast)

#11 Lord_Vader

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Posted 26 April 2007 - 02:44 PM

I have to admit, for the aperture and cost, those spot diagrams looks real good. That is pretty close to what can be achieved by a Chromacor I on a 6" F/8 achro.


Chromacor-I in a 6" F/8 is about 2x better in the C-F range.
These spots are about the same as Chromacor-I in an 8" F/8 achromat.

#12 Gaz O'C

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Posted 26 April 2007 - 05:16 PM


Is there a big difference visually from a 150mm?

#13 gmacln

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Posted 26 April 2007 - 05:59 PM

Can't wait to see the reviews of Markus' new project. I could see myself purchasing one of these - 180 f/6 or even the 203. Definitely more in my price range - especially since I only do visual. I get all queezy when I look at the $ of a 180 or 203 apo. Not to mention the cost of a mount to hold it...

#14 pollux

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Posted 26 April 2007 - 07:56 PM


I am pretty much out of the market at this time. ;)


Easy, just sell your soul to Satan :lol:

#15 rusirius6278

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Posted 26 April 2007 - 08:22 PM



I am pretty much out of the market at this time. ;)


Easy, just sell your soul to Satan :lol:



that`s right. that`s the ticket. :mrevil: :scared: :mrevil: :grin:

#16 Scott Beith

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Posted 26 April 2007 - 08:25 PM

You guys go first and let me know how it works out for you. :lol:

I will stick with my current collection of tiny little scopes. ;)

#17 Refractor6

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Posted 26 April 2007 - 08:43 PM

There is a review coming soon of the TMB/APM 7.1" f/6 achro.

All as I can say at this time about this scope is WOW!


Karl
E.O.H.
R.A.C.


I saw the spot diagram for that lens which Markus included in his ad, and said the same thing! :grin:


Clive

This is from my post on the Yahoo group refractor forum:

The owner is in my club, and this past Saturday night I had my first chance to look through it. WOW!

The contrast and clarity is extraordinary. It handled power from 36x to 360x. By far the best wide-field views I've seen. Period!

The views of the Veil, Lagoon/Trifid, Omega, and Eagle nebulas, are still imprinted on my mind.

Showed detail in many galaxies (spiral in M-51), and globs were resolved into tiny pinpoints on black velvet.

My 6" Antares refractor (a very good scope) could not keep up with this larger, higher end refractor.

It even impressed a "dob only" guy in our club, who had his 20" Obsession next to the big refractor.


This is my take on the one night with the scope. I'll let the owner of this fine instrument do his review.

Of course both of us (and others) who have seen through these large achros ( his 7.1" and my 8") will be at NEAF all day Saturday, and would be glad to talk to anybody about these fine telescopes :)


Karl
E.O.H.
R.A.C.

22" F/4.5 Dob
12.5" F/4.8 Dob
8" F/9 Refractor (The Beast)
6" F/6.5 Refractor (Mini-Beast)



Looking forward to the full review Karl and have a great time this weekend at NEAF.



----------------------

Stan

Takahashi FS-102 NSV
Antares 152 f/8 prototype
Antares 152 f/6.5
Antares 127 f/6.45 prototype
Orion 9x63 mii giants
Pentax 20x60 PCF WP

#18 galaxyman

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Posted 26 April 2007 - 10:24 PM

Is there a big difference visually from a 150mm?


Yeah, there was, and this (Antares) is a very good 152mm.

Karl
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R.A.C.

Chesmont Astronomical Society
22" f/4.5 Dob
12.5" f/4.8 Dob
8" f/9 refractor (The Beast)
6" f/6.5 refractor (Mini-Beast)

#19 galaxyman

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Posted 26 April 2007 - 10:33 PM

There is a review coming soon of the TMB/APM 7.1" f/6 achro.

All as I can say at this time about this scope is WOW!


Karl
E.O.H.
R.A.C.


I saw the spot diagram for that lens which Markus included in his ad, and said the same thing! :grin:


Clive

This is from my post on the Yahoo group refractor forum:

The owner is in my club, and this past Saturday night I had my first chance to look through it. WOW!

The contrast and clarity is extraordinary. It handled power from 36x to 360x. By far the best wide-field views I've seen. Period!

The views of the Veil, Lagoon/Trifid, Omega, and Eagle nebulas, are still imprinted on my mind.

Showed detail in many galaxies (spiral in M-51), and globs were resolved into tiny pinpoints on black velvet.

My 6" Antares refractor (a very good scope) could not keep up with this larger, higher end refractor.

It even impressed a "dob only" guy in our club, who had his 20" Obsession next to the big refractor.


This is my take on the one night with the scope. I'll let the owner of this fine instrument do his review.

Of course both of us (and others) who have seen through these large achros ( his 7.1" and my 8") will be at NEAF all day Saturday, and would be glad to talk to anybody about these fine telescopes :)


Karl
E.O.H.
R.A.C.

22" F/4.5 Dob
12.5" F/4.8 Dob
8" F/9 Refractor (The Beast)
6" F/6.5 Refractor (Mini-Beast)



Looking forward to the full review Karl and have a great time this weekend at NEAF.



----------------------

Stan

Takahashi FS-102 NSV
Antares 152 f/8 prototype
Antares 152 f/6.5
Antares 127 f/6.45 prototype
Orion 9x63 mii giants
Pentax 20x60 PCF WP


The review should be interesting. It is a shame Markus has decided to stop making this scope, for it is an absolute great refractor, particularly for the current price.

I been to all the NEAF's, and will enjoy it, though it won't be like last year coming home with the Beast.

Karl
E.O.H.
R.A.C.

Chesmont Astronomical Society
22" f/4.5 Dob
12.5" f/4.8 Dob
8" f/9 refractor (The Beast)
6" f/6.5 refractor (Mini-Beast)

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#20 Refractor6

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Posted 26 April 2007 - 10:46 PM

I love that pic of the scope from last years NEAF. What a beauty Karl!.


-------------------

Stan

Takahashi FS-102 NSV
Antares 152 f/8 prototype
Antares 152 f/6.5
Antares 127 f/6.5 prototype
Orion 9x63 mini giants
Pentax 20x60 PCF WP

#21 Moravianus

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Posted 26 April 2007 - 11:31 PM

I have to admit, for the aperture and cost, those spot diagrams looks real good. That is pretty close to what can be achieved by a Chromacor I on a 6" F/8 achro.


Chromacor-I in a 6" F/8 is about 2x better in the C-F range.
These spots are about the same as Chromacor-I in an 8" F/8 achromat.


Valery,

so what would Chromacor do with this new Markus concept scope ?

#22 Lord_Vader

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Posted 27 April 2007 - 02:21 AM

I can't tell you something exactly, but possibly the correction will be to a level of an ED Triplet at F/7-8.

#23 Nebhunter

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Posted 27 April 2007 - 04:49 PM

Well, if Markus is listening - he should offer the scope as a system with the Chromaco installed and preset from the factory. But that could hurt the sale of "natural" Apo's? I will not pay the BIG bucks for a 7 or 8" high end Apo, but this combination might be doable.

#24 galaxyman

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Posted 27 April 2007 - 10:32 PM

Well, if Markus is listening - he should offer the scope as a system with the Chromaco installed and preset from the factory. But that could hurt the sale of "natural" Apo's? I will not pay the BIG bucks for a 7 or 8" high end Apo, but this combination might be doable.


Why ruin it with something like that :question: :grin:

This baby is a deep space scope, and very good at it:waytogo:

Karl
E.O.H.
R.A.C.

Chesmont Astronomical Society
22" f/4.5 Dob
12.5" f/4.8 Dob
8" f/9 refractor (The Beast)
6" f/6.5 refractor (Mini-Beast)

#25 Nebhunter

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Posted 28 April 2007 - 10:18 PM

I don't see how adding a Chromacor would ruin this scope. If it reduces the CA down to almost nil, then this would make it an exceptional value. I'm thinking of the planets and lunar. Simply remove the diagonal with the Chromacor, and replace with a regular diagonal - and you are back to the deep space scope. The way I see it, anyway.


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