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Takahashi EM11 load capacity enough for CN-212?

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#1 Ryuno

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Posted 28 October 2013 - 04:54 PM

I am presently using the CN-212 with an iOptron ZEQ25 mount (see picture), but this setup is too unstable and vibration prone for visual. Therefore, I am looking for a more steady alternative, but at the same time staying portable.

The CN-212 without accessories weighs 8kg, with a tube length of about 30". The nominal maximal load capacity of the EM11 is 9kg, the optimal 6kg. However, I read that Tahashi's nominal load capacities are notoriously conservative. Would the EM11 be able to carry a Cn-212 OTA with eyepieces, binoviewer or camera gear etc. so that meaningful work is possible?

Best regards
Heinz

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#2 orlyandico

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Posted 28 October 2013 - 09:08 PM

This is... interesting.

8kg is only about 17lb which is far less than the ZEQ25's rated capacity. And you say it's not stable even for visual? granted the CN212 is a long tube, but I guess this says something about iOptron's weight ratings..

#3 Bluejay08

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Posted 28 October 2013 - 10:54 PM

212mm in diameter and 855mm in length without accessories, it will be a little challenge to balance on a mount in this payload range. Using an extension bar to balance the OTA won't do any good for stability.

My 2C.

Jay

#4 TxStars

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Posted 28 October 2013 - 11:09 PM

I would advise a larger mount.
On my EM-10 (older version of EM-11) the CN-212 was ok for visual both Newt & Cass.
As long as there was not much wind I could on/off guide in cass mode.
I did not have a light guider to mount up top at the time so not sure how well that would work.

#5 orlyandico

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Posted 28 October 2013 - 11:22 PM

i think the OP only wants to do visual..

#6 TxStars

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Posted 28 October 2013 - 11:57 PM

"Would the EM11 be able to carry a Cn-212 OTA with eyepieces, binoviewer or camera gear etc. so that meaningful work is possible?"

#7 Stellarfire

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Posted 29 October 2013 - 08:27 AM

Heinz,

In combination with the intended use with binoviewer, (heavy) eyepieces or camera gear, the EM-11 is too light.
Forget the EM-11 for your CN-212, even for visual only. At serious lunar powers of 400x and above, you will never be happy with it.
I would go with the EM-200, this is the right mount for your CN-212 and the mount which Takahashi recommends for OTA's in the Mewlon-210, CN-212 or TOA-130 class.

Stephan

#8 tomcody

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Posted 29 October 2013 - 03:02 PM

"Would the EM11 be able to carry a Cn-212 OTA with eyepieces, binoviewer or camera gear etc. so that meaningful work is possible?"

Check out this site for a good review of EM11 carrying capacity;
web page
Rex

#9 Ryuno

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Posted 30 October 2013 - 05:16 AM

Thank you very much for your help, everyone. I am afraid, I have to face the fact that there is no portable solution for the CN 212 with a German Equatorial Mount. Too sad!
I might have to stick to a altitude-azimuth type of mount, such as the TReX, the DM-mount or the AOK. This also means, that portable imaging will not be possible with the CN 212. There is one solution though, albeit a very expensive one. This is the Danish altitude-azimuth mount TTS-160 Panther, which also was designed for imaging and has a load capacity of more than 20kg, while staying portable. But the price...! This is the link:
http://trackthestars...telescope-mount
A dream?

Heinz

#10 Stellarfire

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Posted 30 October 2013 - 05:36 AM

There is one solution though, albeit a very expensive one. This is the Danish altitude-azimuth mount TTS-160 Panther, which also was designed for imaging and has a load capacity of more than 20kg, while staying portable. But the price...! This is the link:
http://trackthestars...telescope-mount
A dream?

Heinz


Never heard of the Danish TTS-160 Panther mount. Thanks for bringing it to our attention, it looks very interesting! Telescope capacity is specified at generously 16-24 kg, depending on mount configuration and telescope length. Sounds good and well worth to be considered, if money is no problem. In other case, and for portable visual only, I would opt for the AYOmaster from AOK Swiss.

Stephan

#11 Ryuno

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Posted 30 October 2013 - 06:25 AM

Yes, the AYOmaster Looks like a very good mount, and it should be able to carry a heavy scope easily, but on the other hand it is more than double the price of a T Rex, And it does not have slow motion controls. The T Rex does have less load capacity but it works very well with my M 250. So it should work also with the CN 212, I suppose.

#12 Ryuno

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Posted 30 October 2013 - 06:30 AM

This Danish mount is rather heavy, so I am a little bit in doubt about the portability. It weighs 25 kg without counterweights. But it is very versatile. It can be used as a side mounting mount, for example to mount to telescopes together on both sides. Or as a centre mounting mount for one telescope only with counterweights, for imaging. And it is very beautiful.

Heinz


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