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Alien 13

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Posts posted by Alien 13

    RedCat 51 first image - Oh No!

    in Discussions - Scopes / Whole setups

    Posted · Edited by Alien 13

    36 minutes ago, FLO said:

    I’ll mention that to Es’ when I next see him ?

    Steve 

    The comment was a bit tongue in cheek but have noticed that highly regarded lenses like the Samyang 135 f/2 with a measly 11 elements still manages to control collimation to a very high degree, I wonder whats their secret?

    Alan

    • Like 1

    William Optics RedCat 51 APO

    in Sponsor Announcements and Offers

    Posted

    9 minutes ago, Mobile Wizard said:

    Hi Alan,

    Thanks for your input. Thanks for the information on removing the M48 adaptor to reveal the M56 thread.

    Looking on the internet there don't seem to be a lot in the way of M56 adapters.

    It looks like I need one of these:

    https://williamoptics.com/products/48-mm-to-42mm-thread-adapter

    And one of these also:

    https://www.amazon.co.uk/Baader-Planetarium-Micro-Thirds-T-Ring/dp/B00FQCGAHO?th=1

    I don't know were this leaves the back focus.

    What are others looking to get or using.

    Regards.

    Mark

     

    The back focus distance is normally standardized with T rings and matching cameras at 55 mm, for instance Canon have a flange to sensor distance of 44 mm so the T adapter ring is designed to be 11 mm thick. The micro 2/3 has the sensor much closer to the flange so the matching adapter is quite deep but fine for the job.

    The baader one looks a bit over complicated but there are plenty of the standard type around.

    Alan

    William Optics RedCat 51 APO

    in Sponsor Announcements and Offers

    Posted · Edited by Alien 13

    7 minutes ago, RayD said:

    This was my thoughts too, Alan.  I think when you see how compact it is, and the fact that the dovetail also has a standard tripod profile, it seems evident that WO intended for this to be used on a mobile set up, and not in an automated fixed observatory necessarily. 

    It may even be that due to the small objective and fully aluminium construction it doesn't need lots of re-focusing anyway?  It may be an idea to spend one night just measuring FWHM levels to see how much this changes with respects to temperature change.

    These are all good comments actually as it is helping me compile a list of specific tests to carry out.

    Thanks Ray, manual focus camera lenses do fine on portable rigs and provided the focus ring on this one is smooth and without slop etc it will be a winner. 

    Alan

    P.S. As it will no doubt be cloudy during your testing it would be nice to know how it does perform as a "camera" lens in the daytime.

    Alan

    • Like 1
    • Thanks 1

    William Optics RedCat 51 APO

    in Sponsor Announcements and Offers

    Posted

    8 minutes ago, R26 oldtimer said:

     

    Oops!! That seems to be that scopes Achilles heel, that will kill it for astrophoto. I think no one will fiddle with 3d printed solutions and stepers to focus a £750 50mm scope.

    I cant see that matters, the scope will probably spend most of its time on portable rigs like the SA and most likely with a DSLR or simple CMOS camera set up for hands on AP.

    Alan

    • Like 3

    William Optics RedCat 51 APO

    in Sponsor Announcements and Offers

    Posted

    8 minutes ago, RayD said:

    My initial thoughts are I think this is going to need the short WO screw fit one.  From what I could see it doesn't come with a compression fitting, only the M48 screw back on the rotator.

    I'll definitely try everything I can to fit one, and have more adaptors than an adaptor factory so I reckon if it can be fitted, then I will make it fit.

    Looking at one of the videos it seems to suggest that the whole back end comes off including the rotator (not the focusser) which should give more back focus for a diagonal but looks like it needs to be special ...

    Alan

    William Optics RedCat 51 APO

    in Sponsor Announcements and Offers

    Posted · Edited by Alien 13

    10 hours ago, FLO said:

    Happy to post photos but I don’t think a review from me, or any other retailer, is a good idea. Reviews by non-retailers are more credible ?

    Steve

    I dont see an issue with you or any of your team supplying additional factual information though for example configurations that work and those that dont etc.

    Have to say also that this is one product that has my wallet sweating :D and not just for imaging, it could make a smashing wide field visual setup for those who cant get on with binoculars..

    Alan

    Canon 2x extender

    in Getting Started With Imaging

    Posted · Edited by Alien 13

    3 hours ago, Tuda78 said:

    Well the extender arrived this morning and unfortunately doesn't appear to work with the telescope. I have the extender attached the camera and then my T ring onto the extender. The camera switches on, I can focus the camera but when I take a picture I get an error code and a message telling me to check the lens contacts. Looks like Ill just be using it with lenses.

    It might still work if shooting in video mode which could be handy for Luna or Planets.. 

    Alan

    Canon 2x extender

    in Getting Started With Imaging

    Posted · Edited by Alien 13

    Interesting, I think the Canon TC is very much like a powermate in that it should be vastly superior to any barlow lens, I do not know however if using one without a lens would produce an error code (easy to try out), I have found this old thread that may help.

    This is something I must try myself with my Kenko version .

    I think the method of connection is to fit the TC to the camera as normal then use a EOS to T adapter fitting into the Teleconvertor you then would need the standard kit for fitting into the focus tube etc, you will need a two inch extension in there too.

    Alan

    • Like 1

    3D Printers

    in DIY Astronomer

    Posted

    I have been thinking about 3D printer costs and was wondering what part takes up most of the cost?, after all a modern scanner copier is more complex with more moving parts but are very cheap.

    Alan

    3D Printers

    in DIY Astronomer

    Posted

    Have been browsing again and found the PocketMaker 3D Printer and the Createbot Super Mini 3D printer that fit the bill size wise but have no idea if they are any good, there does seem to be a lack of small printers on the market.

    Alan

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