iOptron 6" Rumak Maksutov-Cassegrain Telescope

[FLO]

As requested 🙂 

FLO now stocks the iOptron 6" Rumak Maksutov-Cassegrain Telescope. 

Very nice it is too!  More hefty than we are used to. Features include a dual-speed focuser and a nice metal twist-on dew-shield. 

There is also a dedicated motor-focuser available, will add that to our website later today or tomorrow. 

Steve

 

[FLO]

[CraigT82]

Very nice, looks like a Rumak ....is it?  6" maks hit a real sweet spot of portability and power, nice to see more coming to market.

[FLO]

It is. Thought I had include that in the product title. Sorry 🙃

Will do that now. Thank-you 🙂 

[FLO]

Done 🙂 

[johninderby]

Looks like a nice solid lump. About 10kg so indeed no lightweight.

[chiltonstar]

Hmm.....looks very nice!

Chris

[CraigT82]

Very interesting! Not really many Rumaks around. Ioptron are really bringing some interesting stuff to market.  I'd love to get my hands on one to see how it compares to a Gregorian.

Edited October 30, 2019 by CraigT82

[johninderby]

Too many interesting new scopes comming out now. 😁

 

[FLO]

We are continuing to stock their  iOptron Photron 6" Ritchey-Chrétien. 

The 8" Ritchey-Chrétien telescope is also here but it'll take us a day or two to make the photos then add it to our website 🙂 

[ollypenrice]

I confess to not having known what a 'Rumak' was but Prof Ian Morrison came to the rescue: http://www.ianmorison.com/maksutov-telescopes-a-survey/

Olly

[CraigT82]

The Rumak should offer sharp images right to the edge of the field of view.  Great for lunar imaging with the large chipped modern cameras  (ASI183 etc...)

[FLO]

We have added the following explanatory text to our product description page 🙂 

"Gregory vs Rumak

Gregory

Most Maksutov telescope available today (i.e. from Sky-Watcher, Celestron & Meade) are Gregory Maksutovs where the secondary mirror is a simple aluminised circle essentially glued onto the interior surface of the corrector lens. Therefore the curvature of the secondary mirror is always the same as the curvature of the corrector lens. From an optical design perspective this is a compromise but it does enable high contrast Maksutov optics to be manufactured at lower prices. 

Rumak

The Rumak Maksutov, named after its designer designer Harry Rutton, is a more sophisticated design. A Rumak's secondary mirror is distinct and separate from the corrector lens so the optical designer has more freedom to enhance performance. Typically, for the same focal length, a Rumak Maksutov has a flatter field and tighter stars when compared to a Gregory Maksutov. This makes the Rumak Maksutov an especially good choice for astrophotography." 

If you look at the photo in our second post above you can just-about make out the separate secondary. 

[michael.h.f.wilkinson]

Nice looking scope but surprisingly hefty at 13.4 lbs. My C8 is lighter than that

[Peter Drew]

On 30/10/2019 at 16:32, CraigT82 said:

Very interesting! Not really many Rumaks around. Ioptron are really bringing some interesting stuff to market.  I'd love to get my hands on one to see how it compares to a Gregorian.

Be careful not to confuse Gregory with "Gregorian".  The Gregory is the design with the central area of the inner surface of the corrector forming the secondary. The Gregorian design has the corrector reversed, that is, the convex side facing skywards.  This arrangement provides a terrestrially orientated image.     🙂

[johninderby]

For firther reading on the subject this covers many types of catadioptric designs many of which you probably won’t be familiar with.

http://www.photonics.intec.ugent.be/education/IVPV/res_handbook/v2ch18.pdf

Edited November 1, 2019 by johninderby