Jump to content

sgl_imaging_challenge_6_banner_jupiter_2021.jpg.eacb9f0c2f90fdaafda890646b3fc199.jpg

 

 

Removing a Skymax (Pro) MAK 150 corrector


Recommended Posts

Probably another statement of the obvious, but since I've finally mustered the courage! :(

As previously sussed, the OTA "Rivets" are actually round-head M2.5 hex bolts. Simply unscrew and the (weighty) corrector cell parts with the (Gold) tube. Remember to MARK the "screw to hole" correspondence to (nominally!) preserve collimation? :p

The purpose? I have LONG wanted to replace the [iMO] flimsily attached Dovetail Bar on my MAK150 with Tube Rings. The OTA seems (shortly to be proven!) to fit the SW 182mm (6" OTA) rings... Not sure the MAK 180 is similarly served though. :D

Edited by Macavity
Link to comment
Share on other sites

Interesting, I've not had any issues with the supplied dovetail. What problem are you hoping to solve by doing this?
None, with the MAK 150? But it seems anecdotal (purists reckon!) the MAK 180 OTA "flexes" as the scope moves around and it seems that the small M4 bolts don't provide much in the way of structural support? ;)

Personally, I'm mostly looking to ease the process of "lofting" the scope on and off the mount! I am forever, slightly anxious, about fumbling and DROPPING a dewed up (smooth) OTA. Tube rings and dovetail bars either side, give me that extra (perceived) security. :o

Edited by Macavity
Link to comment
Share on other sites

I have a SW 200p also, which mounts in exactly the same way. Now THAT has flexing issues! But that has twice the mass and three times the length. In comparison the Skymax seems perfectly rigid, you can rest your hand on the focuser without the view wobbling all over the place for a start.

Is this flexing an issue reported by people doing long exposure photos, tracking for 10, 15 even 20 mins?

Link to comment
Share on other sites

Hey, I don't want to start no rumours. (sic). <G> Hence the word "anecdotal" in my post? From memory, the source MAY well have been discussion on CN. I remember reading the following review too: Skywatcher 180 Pro–Mak - Review.

On re-reading, it is less clear whether the specific problem, alluded to, is an individual fault or general "feature". Of consolation, I was AMAZED at the thickness of the MAK150 OTA! Indeed, makes my new TS photo-newt feel like a construct of the WRIGHT bros. Both spider and finder were so tightened, that the tube now has permanent indentations. ;)

Edited by Macavity
Link to comment
Share on other sites

Well you might be onto something, thinking about it from an engineering viewpoint using the wall of sheet metal tube to attach a mounting point is daft!

Tapping into the end castings is a better idea, or just use tube rings as you mentioned.

Keep us updated, interesting one.

Barry

Link to comment
Share on other sites

Is there any way of getting a carry handle on one of these? The Intes M67 has a carry handle which is an essential feature in my opinion.

I'd be careful, the casing on the Intes 67 is made of much more robust stuff than the Skywatcher Maks. TBH its no hardship to carry it to the mount underarm though.

Link to comment
Share on other sites

Heheh - Well, if Gavin Henson fumbles one, Gaz? The "carrying handle" envisaged is just a second dovetail bar, on the top. But STILL waiting on delivery of MAK150 rings. As far as I know, there are NO Skywatcher MAK180-sized rings anyway. ;)

Link to comment
Share on other sites

Heheh - Well, if Gavin Henson fumbles one, Gaz? The "carrying handle" envisaged is just a second dovetail bar, on the top. But STILL waiting on delivery of MAK150 rings. As far as I know, there are NO Skywatcher MAK180-sized rings anyway. ;)

LOL!! Yep, thats the style I employ Mac, no fumbles yet touch wood.

The rings from a Skywatcher 8" Newt are a close fit and just need about 5mms of foam padding to fit.

Edited by GazOC
Link to comment
Share on other sites

Well, there ya go... Tube Rings! Overexposed (sic!) a tad, maybe, but: :D

MAK150ring.jpg

In fairness, the Skywatcher (nominal) D=182mm *were* a bit tight on the MAK150 OTA! I was fairly happy to remove the felt linings! But, HEY - An "instant" carrying handle. With the previous, LONG, dovetail bar out of the way, more ROOM for my (camper mat!) dew shield, and decent thermal contact for a (previewed) heating strip? Now I also get to fix a (spare, cherished) ORION RACI finder at the balance point of the system. Perhaps even a fixing method (using an extended dovetail bar) for my cheapo, electric focusser plans... :o

Much madness, but maybe a little METHOD, occasionally? ;)

Edited by Macavity
Link to comment
Share on other sites

Looks the business Mac!
Heheh. Thanks Gaz. Encouragement always welcome! Now all I need do is imagine that... 7-8" F10, 1/8 lambda, "Ruski" MAK (whatever) as the prime mover? :o

Aside: Fine(?) though it is, but not sure I will ever TOTALLY appreciate a recently purchased TS 8" photo newt. Just that the MAK setup seems a lot simpler... ;)

Edited by Macavity
Link to comment
Share on other sites

f4 can be a lot of messing about as you know Mak, even visually. The best upgrade I got on my f4.5 Dob is the improved mirror cell, it holds the mirror solid and stops me having to recollimate every time a slight breeze gets up.;)

Link to comment
Share on other sites

f4 can be a lot of messing about as you know Mak, even visually. The best upgrade I got on my f4.5 Dob is the improved mirror cell, it holds the mirror solid and stops me having to recollimate every time a slight breeze gets up.:D
Weeeell, I won't rid myself of it [the "TS"] too quickly? As you suggest, the *hardware*, of fast Newts, might bear a little "improvement" <G>? Even with dodgy collimation, things (e.g. Mizar) appeared visually spectacular tho' - Bright, anyway! Even Saturn looked intriguing... ;)

EXTREMES are fun to explore? MAKs, Fast Newts. Can't help but feel, I'd've ended up less stressed, much richer (equally as wise?) with one of THESE though! (Free sponsor plug). Repent at leisure? :o

Edited by Macavity
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.