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Questar 5

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#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.



#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   90 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! 😩😢


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