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APM DOUBLET ED APO 152 F/7.9 vs TV-101 which would you chose

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#1 chuckscap

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Posted 20 May 2020 - 01:16 PM

I have a TV-101 so it's not just a hypothetical.   Trying to decide whether to save up for a used 150 mm AP scope or sell my TV-101 and buy the APM.   So far leaning towards saving up.  

 

Thanks!



#2 bobhen

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Posted 20 May 2020 - 01:30 PM

That depends on what you are using your TV 101 for.

 

If you are using your TV 101 for imaging, lunar/planetary observing and low power, wide field, deep sky observing, then I would say keep it and start saving. A 4” apo is a nice scope to have.

 

However, if you are only using your TV 101 for low power, deep sky observing, you could sell it and get a 102 mm F-5 or 120 mm F-5 achromat for just a few hundred dollars and put the rest toward the larger refractor.

 

The achromats will not have a perfectly flat field but at the low powers used for wide field, deep sky observing that, and the CA in those scopes, will not present much of an issue.

 

Bob



#3 db2005

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Posted 20 May 2020 - 02:11 PM

If you don't already own another smallish scope for quick observing sessions I think you will very quickly be longing for the TV-101 again. A 6" Apo is a very different kind of beast to handle and mount.

 

Personally I'd take the TV-101 at the drop of a hat. Mainly because I have no desire to handle and mount a 6" Apo, but also because I like great optics, and I'm a sucker for pretty, well-made telescopes. If I were to complement a 4" Apo (instead of replacing it) I'd get a 8" SCT.


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#4 chuckscap

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Posted 20 May 2020 - 02:25 PM

Thanks I have a very good Orange C14, that I'm probably going to sell as well.   I have the TV-101 on an AP900 and switch between visual (mainly double stars and planets) and imaging (I'm a beginning imager).    My Colorado Springs skies are pretty bad, looking to move back into the mountains.   Didn't want to piggyback the TV-101 on top of the C14 as Astro-physics recommended against it.   Since I"m not looking for grab and go (I leave my scope mounted and covered), I'm thinking of a 6" APO.   The TV-101 is extremely nice though, decisions, decisions ...



#5 demorcef

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Posted 20 May 2020 - 02:44 PM

You could jump ship completely and go with all Takahashi products. They are prettier, younger, and faster than the Televue stuff grin.gif grin.gif grin.gif


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#6 drd715

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Posted 20 May 2020 - 03:06 PM

Keep the 101 as it is a sweet scope capable of easy transportation to events and good for daytime distance views, also quick viewing. Save up for the 152mm. It is a handful, but a great performer when you can put in the effort to handle it. At 1200mm it needs a solid mount especially if you are imaging with it.

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#7 Phillip Creed

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Posted 20 May 2020 - 03:18 PM

+1 on the idea of keeping the TV-101 and saving up for the APM 152.  These two instruments seem more complimentary than competitive.

Clear Skies,

Phil


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#8 ris242

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Posted 20 May 2020 - 07:17 PM

The APM 152 Doublet - may not be around much longer. You better grab one!

 

Vendors section

message titled - last 25 pc APM 152 ED



#9 stevew

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Posted 20 May 2020 - 07:39 PM

Years ago I sold my TV Genesis SDF to help fund a TMB130.

And while I love the TMB130 I dearly missed the convenience and versatility of the 4 inch TV.

The 130 triplet is very nose heavy and requires a much more substantial mount. I'm sure the same would be true for the APM 152.

I eventually bought a Stellarvue 102 ED that helped scratch the itch I had for a portable 4 inch.

 

You mentioned that you have an AP900 that would handle an APM 152, but after you get over the initial excitement of a new 6 inch ED, you would realize that your C14 will show much more detail on the Planets and DSO than any 6 inch refractor, and would require about the same amount of effort to set up.

I'd say don't sell the TV-101.


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#10 areyoukiddingme

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Posted 20 May 2020 - 07:43 PM

I have a Televue 101, and had an Explore Scientific 152ed.



#11 doctordub

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Posted 23 May 2020 - 01:54 AM

I agree with the above statements, keep the TV 101. I have a TV NP-101 that was convenient to have in the winter of 2019 Lunar eclipse because it was cold and windy. My Takahashi FS-152 would need my DM6 or Losmandy mount, but my NP-101 was carried out on a halfhitch on an Oberwerk tripod in one trip! My kids and I were able to view the entire Lunar eclipse with little hassle.

CS

Jonathan


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#12 Tyson M

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Posted 23 May 2020 - 03:18 AM

The APM 152 Doublet - may not be around much longer. You better grab one!

Vendors section
message titled - last 25 pc APM 152 ED


I think that because of this fact alone I would act. You can always buy another TV101 or NP101 some day again. Especially if you mount the TV101 permanently anyways.

#13 Jon Isaacs

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Posted 23 May 2020 - 06:30 AM

I think that because of this fact alone I would act. You can always buy another TV101 or NP101 some day again. Especially if you mount the TV101 permanently anyways.

 

And you can always buy another 6 inch F/8 ED Doublet. They show up used on a regular basis.. 

 

And, waiting has the advantage that improved versions, new models, may become available. Or may be a used 6 inch triplet like the Astro-Tech may become available at an affordable price.

 

Trading a very good 4 inch and plus an $1000 for an entry level 6 inch doesn't make sense to me.

 

Jon



#14 chuckscap

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Posted 23 May 2020 - 10:25 PM

Thanks all, maybe I'll just enjoy what I have and keep an eye out for a great deal on an Astro-Physics 6" refractor 



#15 RichA

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Posted 24 May 2020 - 01:32 AM

I agree with the above statements, keep the TV 101. I have a TV NP-101 that was convenient to have in the winter of 2019 Lunar eclipse because it was cold and windy. My Takahashi FS-152 would need my DM6 or Losmandy mount, but my NP-101 was carried out on a halfhitch on an Oberwerk tripod in one trip! My kids and I were able to view the entire Lunar eclipse with little hassle.

CS

Jonathan

I was brutal that night.  I used an 80mm apo and it was a chore. 




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