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New Radian Raptor

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34 replies to this topic

#26 drhollen

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Posted 18 November 2020 - 01:27 PM

Baader makes a Nikon Z-mount wide T-ring. #2408335

It comes standard with a M42x0.75 adapter, but it is interchangeable with other adapters and you'll need the S52 to M48 adapter #2958552 to make it work for M48.

https://www.baader-p...-2-and-s52.html

 

I have Canon RF mount and found that they were the only ones who offered native mount like this for the new mirrorless models that could be made to work with M48.

 

Agena Astro sells them.  The native mount is $32, but the tiny S52 to M48 ring is additional $50. I wish they were included.

 

Here is a trick. The Baader #2408317 adapter, for the Sony E/NEX mount cameras includes the S52 to M48x0.75 adapter #2958552 as standard instead of M42 ring, but includes a M42-to-M48 adapter ring. You can buy that for $39 from Agena. Even if you don't need the Sony adapter, you can use the S52 to M48 adapter and save some cash and also have a spare M42-to-M48 adapter ring.  That is what I did.

 

These rings are very thin, with only a 8.3 mm of optical length, which can be helpful in some situations where you want to minimize backfocus. The "typical" T-ring is nominally 11.0 mm, but I've measured mine standard Canon EF M48 ring from William Optics to be 10.30 mm. Remember, if you add a filter in-line, it changes the backfocus slightly. Rule of thumb is add one-third of filter thickness to backfocus. Typical filter thickness if 2 mm, so add about 0.7mm thickness for backfocus calculations, which is why I think that the T-ring adapter are either 10.3 or 8.3 mm. Canon EF flange focal distance is 44 mm, so 44+10.3+0.7 = 55 mm, so you wouldn't need any additional adapters.  With my Canon RF mount, the RF flange focal distance is 20 mm, so 20 + 8.3 + 0.7 = 29 mm, so I need an additional 26.0 mm of adpters to make up the backspacing. Could add a filter slider and a 5.0mm adapter for example.  For your Nikon Z-mount, the Z-mount flange focal distance is 16.0 mm, so add the 8.3 mm of this adapter and you'll have to make up the 55 mm backfocus difference with additional spacers.  So 55-16-8.3-.7 = 30 mm and that is how much spacing you'll need between the Baader T-ring adapter on Nikon Z and the Raptor M48 threads if you use a filter in the optical train.

 

Edit:  OK, just noticed that William Optics now has Canon RF-mount 48mm adapter as well. My guess is optical path would be 34.30 mm, but unsure.


Edited by drhollen, 18 November 2020 - 03:00 PM.


#27 xraydrummer

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Posted 18 November 2020 - 02:11 PM

Thanks Viking, just ordered the WO version for Z. Appreciate the help.



#28 Noobulosity

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Posted 18 November 2020 - 03:01 PM

Viking is just the user activity level, user names are above that.  smile.gif  I'm glad that T-ring will work for you.


Edited by Noobulosity, 18 November 2020 - 03:01 PM.


#29 NoDarkSkies

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Posted 20 November 2020 - 08:30 PM

It came in today smile.gif

50626149468_c0e206afa9_b.jpg

 

50626994997_bb978145bb_b.jpg

 

Items I do not care for are the Clamps in White Mark and Scratch the the Items in Yellow so be careful.

50626898091_8d0bd02c32_o.jpg

 

Another item is that the Rings use 2 different sizes of screws and you only get 4 of each and they are to long for most items to use so I take it that the are Only for the use with their 4" V-style dovetail and 6.5" universal D-style plate.


Edited by NoDarkSkies, 20 November 2020 - 08:32 PM.

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#30 NoDarkSkies

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Posted 20 November 2020 - 09:55 PM

Not an Astro image but first light & image take with my Canon EOS Rebel T6i Digital SLR Camera.
I did have to put the focus knobs on top to balance with the Camera Mounted.

50627143691_c736cb5148_b.jpg


Edited by NoDarkSkies, 20 November 2020 - 09:57 PM.

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#31 cjgilpin

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Posted 21 November 2020 - 07:00 PM

Not specific to the Radian Raptor but I am trying to mount one on a star adventurer pro. Sure I can fix it to the mount but how on earth do I make it able to point anywhere in the sky that I choose. I tried using a ball head which works but nowhere near balanced.

#32 NoDarkSkies

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Posted 22 November 2020 - 12:41 AM

Not specific to the Radian Raptor but I am trying to mount one on a star adventurer pro. Sure I can fix it to the mount but how on earth do I make it able to point anywhere in the sky that I choose. I tried using a ball head which works but nowhere near balanced.

Post a Photo?
 



#33 NoDarkSkies

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Posted 22 November 2020 - 06:12 PM

While using a DSLR Camera it is easy to use and Focus with Telescope what about CMOS or CCD Astrophotography Cameras.

What are you using to to give you the back focus needed with a Camera like from ZWO with a 42mm?

What should be the Back Focus?

I cannot find who's image this was but I see here someone has it setup.

50635367041_a614fb9b51_o.jpg

Please PM me who's image this is, thanks


Edited by NoDarkSkies, 22 November 2020 - 06:13 PM.


#34 EEBA

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Posted 24 November 2020 - 08:20 PM

Sorry to join this thread, I got my radian raptor ready to go. jus waiting for a clear night. I have a question. Do any of you raptor owners know what is the focus tension knob for. Not the screw seating below the focuser, the other knob. I cant figure out what it does

#35 NoDarkSkies

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Posted 25 November 2020 - 02:36 AM

First image under a not so nice Moon. 8 * 2 Minutes

I really need the Radian electronic focuser upgrade, I hope it ships Soon.

50644179917_476d418ab4_b.jpg

Moon light killed my last 4 Setsfrown.gif


Edited by NoDarkSkies, 25 November 2020 - 03:03 AM.



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