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Questar 5

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319 replies to this topic

#301 TerryWood

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Posted 29 August 2019 - 03:57 PM

No, I was referring to something internal. They would have to re-design the whole control box as well as make it deeper to accomodate another lens group. Probably way, way more trouble than it's worth. I'm no engineer, so I'm just thinking pie-in-the-sky stuff. Regarding the moon map, I did touch base with Jim Perkins over FB and he said that there's no plans to change it. Yeah, I like the analog approach too without the fancy electronics. But I do have the add-on DEC motor for the Q3.5 which is nice when needed. V/R Terry
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#302 dougspeterson

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Posted 29 August 2019 - 06:44 PM

Do we know if the 5 will have a rotating tube? Major dissipointment in the Seven and one reason I didn’t keep it.



#303 munirocks

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Posted 30 August 2019 - 04:05 AM

Just thinking out loud here. Is the top eyepiece holder for 1.25 eyepieces only? Will it at least be able to handle a 24 mm Panoptic without vignetting? If not , the widest True Field of View is going to be narrow. Any data on what the focal length will be?



#304 munirocks

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Posted 30 August 2019 - 04:15 AM

High-end fast Leica lens remain the sharpest at full aperture, far above the competitor. While Leica M body hasn't evolved, lens have been improved in the last decades thanks aspheric surfaces and more complex optical formulae. M is not dead because of the excellence of its optics and mechanical qualities. Innovation drives. 

 

A new 5" Questar should bring something new, otherwise, it is going to cannibalise the sells of its little and big brothers.

I'd like to see a Questar focal reducer correcting the coma... 

The front corrector on a Mak already corrects the coma doesn't it? I thought that was the whole purpose of the Maksutov design.


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#305 spereira

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Posted 30 August 2019 - 06:58 AM

Just thinking out loud here. Is the top eyepiece holder for 1.25 eyepieces only? Will it at least be able to handle a 24 mm Panoptic without vignetting? If not , the widest True Field of View is going to be narrow. Any data on what the focal length will be?

I believe that I've posted this here before, but here it is again.  Back in December of 2018, I got the Q5 Filed Model spec sheet from Jim at Questar.

 

Attached File  Q5 Field Model spec Sheet 2018.pdf   455.72KB   161 downloads

 

smp


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#306 munirocks

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Posted 30 August 2019 - 07:19 AM

Thanks, that's very useful.



#307 Optics Patent

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Posted 30 August 2019 - 08:16 AM

I note that shows a rotating barrel like the 3.5.  Which is consistent with the factory statement that they will make this a scaled up 3.5 Duplex, and not a scaled-down Seven.


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#308 Antares

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Posted 30 August 2019 - 01:19 PM

I wonder when Questar will release a spec sheet for their Q5 Standard? Are they still deciding some aspects of its design?

#309 Optics Patent

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Posted 30 August 2019 - 01:22 PM

My understanding is that the OTA is being developed first and will be released before the drive base is fully designed. 


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#310 agmoonsolns

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Posted 30 August 2019 - 01:28 PM

There was a company briefly around during the 70s selling a control box extender, it fit over and extended back from the control box. This held a filter wheel, some type of reducer, and other items along with many very fancy features. It looked like a pain to add and then you couldn't move the tube through the fork arms anymore. It was very expensive and so I am not really sure how many they would have made or sold. It was from a shop teacher and an engineer in Eastern Washington. I think I still have their catalog here somewhere. If anyone is interested in arcane stuff like this and wants to see it, let me know and I'll go digging for it to upload here. It may have included a diagram with measurements, but I might be remembering something else.

 

They also sold a Meade pier modified to work with Questars, heavier/nicer Q tube counterweights, and stuff like that.


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#311 Antares

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Posted 30 August 2019 - 02:27 PM

Thanks. That makes sense, although it means that my wait for a Q5 Standard will be very long! 😩😢

#312 Mr. Krabappel

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Posted 14 January 2020 - 01:27 PM

I hate to re-open an old thread but I just wondered if anyone has heard any new info or even rumours about the Questar 5?

I'd be quite interested in one of these if they ever came about.



#313 spereira

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Posted 14 January 2020 - 02:45 PM

A prototype of the Field Model was on display at NEAF in 2018, and again in 2019, as documented in this topic.

 

I'm sure that it may be seen at NEAF again this year.  Hopefully, if anyone from here attends NEAF this year, they will update this topic with whatever news there may be.  The last 2 years, the news has been along the lines of "It should be available by the end of the year."  Last year (I think) we got the news that Questar is so busy filling orders for the Q3.5, that development on the Q5 had to take a back seat.

 

I don't think there has been any news on the Q5 since then.

 

smp


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#314 Optics Patent

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Posted 14 January 2020 - 04:42 PM

A week or two ago, I was chatting with Jim R. on a parts order, and asked about the Q5 status.  He said that I could let people know they've been busy with other things, and haven't made much progress recently.

 

That suggests to me that anyone who wants to enjoy a Questar scope in the next year or two (or more?) should buy an existing new or used one.


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#315 Mr. Krabappel

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Posted 14 January 2020 - 07:32 PM

A prototype of the Field Model was on display at NEAF in 2018, and again in 2019, as documented in this topic.

 

I'm sure that it may be seen at NEAF again this year.  Hopefully, if anyone from here attends NEAF this year, they will update this topic with whatever news there may be.  The last 2 years, the news has been along the lines of "It should be available by the end of the year."  Last year (I think) we got the news that Questar is so busy filling orders for the Q3.5, that development on the Q5 had to take a back seat.

 

I don't think there has been any news on the Q5 since then.

 

smp

 

 

A week or two ago, I was chatting with Jim R. on a parts order, and asked about the Q5 status.  He said that I could let people know they've been busy with other things, and haven't made much progress recently.

 

That suggests to me that anyone who wants to enjoy a Questar scope in the next year or two (or more?) should buy an existing new or used one.

Good to know, guys.

Thanks for the info. 



#316 Steve C.

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Posted 14 January 2020 - 09:58 PM

Questars are awesome, but they have to know that an $8000 telescope (my best guess as to price) is not going to be an easy sell.



#317 RalphMeisterTigerMan

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Posted 14 January 2020 - 11:30 PM

When it was (jokingly wink.gif ) stated that the Q5 will be sourced out the China, does this include the optics?

 

I believe one of the reasons for Questar's success is their use of J.R. Cumberland Optical Company. J.R. Cumberland has a reputation for doing amazing work and turning out excisit optics. It would a terrible shame if they were to change something that has been working so well after almost 60 years.

 

 

 

 

 

 

 

I really hope that they stay with there current optical sub-contractor!

 

Clear Skies!

RalphMeisterTigerMan



#318 Erik Bakker

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Posted 15 January 2020 - 12:33 PM

You're right and I don't think they will change that soon.

 

Part of the Questar heritage and a primary reason for their government contracts is that they are completely made in the U.S.A. Early Questar came with eyepieces from Japan, but decades ago they changed to Brandon as the supplier for their eyepieces, which are also made in the U.S.A..



#319 RalphMeisterTigerMan

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Posted 17 January 2020 - 12:15 PM

I have read many of your arguments about the differences in size (not just the diameter) between the Q3.5 and the Q7. Obviously the Q7 is not only physically larger bu also in mass and weight. Many of you would rather stay with your Q3.5 and many love their Q7's. I believe what everyone has missed is what I call the "Goldylocks factor". The Q3.5 is a little on the small size and the Q7 on the large size, I personally believe that many will find the Q5 to be "just right". 

 

Now while I will probably not be able to afford the Q5, I have recently aquired a Celestron C5+. Now don't get me wrong, I will not attempt to compare the C5+ to the new Q5, the point that I am trying to make is that of all the telescopes that I have owned over the last 50 odd years and with my current condition of not being able to carry something really heavy, I believe my C5+ will be just like the new Q5 will be just that..."just right".

 

I hope that all who become Q5 owners will be happy with their purchase. I confess to being envious but I believe I will be happy with my new scope.

 

Clear skies!

RalphMeisterTigerMan



#320 Optics Patent

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Posted 17 January 2020 - 11:31 PM

I believe what everyone has missed is what I call the "Goldylocks factor". The Q3.5 is a little on the small size and the Q7 on the large size, I personally believe that many will find the Q5 to be "just right".


Spot on. I see it as the 3.5 has “surplus portability”. It gives up more performance than needed, and I think some can be traded back for performance and still be thoroughly
convenient.

The Seven is usable by me only on wheels from a ground flor display with no steps and two sets of double doors from
Display to driveway.


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