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IP/CCTV lens for RT224 camera

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138 replies to this topic

#126 diceless

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Posted 31 January 2019 - 11:08 AM

diceless, 

 

Looks neat! I found a 9pcs 37-82mm step ring set at eBay and it is only $5 (free shipping from China).

When they are stacked, are they heavy? 

 

 

I never thought of them as heavy but heavy is a very relative term.  Looked up my order on amazon for the rings I purchased and it listed the shipping weight at 2.9 oz, if you want actual weight PM me and I'll weight them when I get home.  Your set has the same step rings so I'm assuming they will be identical except for the brand name.



#127 Ubuntu

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Posted 31 January 2019 - 01:49 PM

Different topic.

 

This thread began 10 months ago and many different (prime focus or zoom) CCTV and camera lens were tested.

I only have C-mount 8-50mm zoom lens, so cannot compare their differences in the field performance.

 

What is the best lens until now?

and why?

 

 

fromEarth

Hi Fromearth, could you give the reference of this zoom ?

I could only find CS zoom like this...

What is the F/D ??

Thanks :)



#128 fromEarth

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Posted 31 January 2019 - 03:15 PM

I bought it last year from AliExpress ($40).

 

 

@ AliExpress:

https://www.aliexpre...51-796c832c0c37

 

@ eBay:

 

https://www.ebay.com...872.m2749.l2649

 

 

fromEarth

 

 

 

Hi Fromearth, could you give the reference of this zoom ?

I could only find CS zoom like this...

What is the F/D ??

Thanks smile.gif


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#129 diceless

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Posted 31 January 2019 - 10:01 PM

Corey/John,

 

Thanks for the help with the 8-50mm zoom.  I just took the camera out tonight to do a plate solve and it is reporting 47mm max focal length now. 

 

Results from platesolve:

Size: 5.87 x 4.4 deg

Radius: 3.667 deg
Pixel scale: 16.5 arcsec/pixel

 

So yah, I did have some blockage in the internal threads that was preventing me to go the max focal length.


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#130 Ubuntu

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Posted 01 February 2019 - 04:43 AM

I bought it last year from AliExpress ($40).

 

 

@ AliExpress:

https://www.aliexpre...51-796c832c0c37

 

@ eBay:

 

https://www.ebay.com...872.m2749.l2649

 

 

fromEarth

Thanks From Earth.

 

I wonder what is the aperture of this zoom... They put F1.4 but I doubt this is also 1.4 at 50mm, am I wrong ? :)



#131 nic35

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Posted 02 February 2019 - 09:35 AM

Ubuntu:

 

The physical size of the objective is about 34mm.  It has an aperture control - so I assume that if it is left wide open there is no obstruction in the light path - which means f1.4.

 

Below is a shot of the region around m42.  I think this could benefit from a UV/IR filter, or one to control CA. A dew shield of some sort is also a good idea !

 

I was amazed when i played with a shot of the Theta Orionis area using the stock windows photo editor - the flame  nebula jumped right out !

 

john

 

186 seconds integration, lens at 50mm.

 

Stack_93frames_186s_WithDisplayStretch.jpg


Edited by nic35, 02 February 2019 - 09:36 AM.

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#132 CharlesC

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Posted 01 March 2019 - 01:02 PM

Had a good clear night yesterday.

 

I used the opportunity to test my pico projector coupled with wide field  C-Mount EAA as a guide for 7x35 binoculars, as a dry run of future eaa assisted urban binocular outreach for groups. 

 

The results where good. The system worked, but could use some improvements.

  • A way to project a full screen Sharpcap image with no glaring UI.

I am still learning how to run the camera and sharpcap, but last night was the first session where I could focus more on observing than learning the software. It was a blast!

 

I made a Sharpcap script that creates a second window you can drag over to projector.  Periodically you can take a snapshot on Sharpcap and it will appear full screen on second window.

https://www.cloudyni...d-video-window/


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#133 fromEarth

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Posted 22 July 2019 - 09:25 AM

Hi,

 

Is there any news on this thread? --- new lens, cameras, tricks.....?

 

fromEarth



#134 Ubuntu

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Posted 17 August 2019 - 03:11 PM

Hi all,

 

Long time I don't post here...

I got a Lomo 120mm F2... and it's a marvelous lens... here are the result with my IMX385 + IRcut filter. and with sharcap 3.2 on my tripod (no guiding).

 

M31, 252 frames, total 252s

Stack_252frames_252s_M31.jpg


Edited by Ubuntu, 17 August 2019 - 03:13 PM.

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#135 Ubuntu

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Posted 17 August 2019 - 03:11 PM

M8 & M20, 64 frames, total 64s

Stack_64frames_64s_M8 - M20.jpg


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#136 diceless

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Posted 21 August 2019 - 03:02 PM

I'm assuming that is a Lomo projector lens, what are you using to mount it to a camera?



#137 Ubuntu

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Posted 22 August 2019 - 08:14 AM

I'm assuming that is a Lomo projector lens, what are you using to mount it to a camera?

Absolutely... I took a Lomo because of the low F/D.

 

I bought this:

https://fr.aliexpres....27426c37FBVJ1R

 

And then I tried to find a plastic piece that would join the Lomo to this adaptor... and that's it :D



#138 fromEarth

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Posted 22 August 2019 - 12:27 PM

Ubuntu, 

 

You used your previous no-tracking + no-guiding setup. Am I right?

 

fromEarth

 

 

 

Absolutely... I took a Lomo because of the low F/D.

 

I bought this:

https://fr.aliexpres....27426c37FBVJ1R

 

And then I tried to find a plastic piece that would join the Lomo to this adaptor... and that's it laugh.gif



#139 Ubuntu

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Posted 23 August 2019 - 01:15 AM

Ubuntu, 

 

You used your previous no-tracking + no-guiding setup. Am I right?

 

fromEarth

Yes I just put my Lomo on a simple tripod smile.gif

 

IMG_6407 small.jpg


Edited by Ubuntu, 23 August 2019 - 01:22 AM.

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