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14 Nov 2018
Glad to announce of release of INDI Library v1.7.5 on 2018-11-14. A few drivers were added in this release as we continue to improve & stabilize existing drivers.
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TOPIC: Any experience with manually focusing using the Focus module?

Any experience with manually focusing using the Focus module? 4 months 1 week ago #27324

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Hi all,

For focusing my WO 71 and my 8" RC I use a Bahtinov mask and focus manually until the spikes created by the mask are evenly distributed. This works reasonably well but is not perfect, mostly due to me being impatient and me choosing too bright or faint stars. So I looked into the Focus module documentation and I wondered if anyone uses this module while focusing manually? I am considering installing a motor focus on at least the 8" RC but I for now I am stuck to manual focusing.

Any experiences you'd care to share?


Thanks, Wouter

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Modded Canon EOS 700D with a WO ZS 71 ED on a SW HEQ5-Pro /
QHY9 CCD and filter wheel with an 8" RC on a SW EQ6-R

Any experience with manually focusing using the Focus module? 4 months 6 days ago #27338

I use a homemade Moonlite protocol Arduino Focus module for both manual and auto focus. It works great. First I use manual focus to get the stars reasonably clear by manually entering steps. Then I click Autofocus. I am using a DLSR and change the image from RAW to medium fine jpeg which seems to speed up the process especially with subframing.
See the Moonlite focuser protocol discussion for more detail.
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Any experience with manually focusing using the Focus module? 4 months 6 days ago #27339

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Thanks very much, that was very useful. I should have formulated my question a bit better because I don't have a motor focus at all so I need my hand to turn the focuser knob and I'd like to know if that works. I guess the answer is yes and I will for sure try it. And this also gives me a lot of knowledge, so thanks once again!

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Modded Canon EOS 700D with a WO ZS 71 ED on a SW HEQ5-Pro /
QHY9 CCD and filter wheel with an 8" RC on a SW EQ6-R

Any experience with manually focusing using the Focus module? 4 months 6 days ago #27341

In the focusing tab you can simply click Capture once, then select a guide star (by clicking at it in the picture), tick SubFrame and then click Framing. You can then focus manually until you like what you see. Click Stop to end the procedure.

As an alternative, in the CCD tab you could use live view to display the star while you're focusing manually. At least with Canon DSLRs you can zoom into the live view by drawing a box using the mouse.
In both cases the monitor displaying the focus star has to be close to your telescope.
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Last Edit: by Herrhausen.

Any experience with manually focusing using the Focus module? 4 months 6 days ago #27342

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Also very useful, thanks very much!

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Modded Canon EOS 700D with a WO ZS 71 ED on a SW HEQ5-Pro /
QHY9 CCD and filter wheel with an 8" RC on a SW EQ6-R

Any experience with manually focusing using the Focus module? 2 months 3 days ago #29523

Will it help the autofocus module to use a Bahtinov mask? I am thinking of getting one for manual focussing for the time being until my focus motor is ready.

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Skywatcher Newton 200/1000 on EQ6-R
Skywatcher Mak 105/1300 on AZ GTi
StellarMate @ Raspberry Pi 3B+
ASI 290 MC guiding cam on APM 60 ImageMaster
Canon 7D DSLR or ASI 183 MC Pro

Re:Any experience with manually focusing using the Focus module? 2 months 3 days ago #29526

I plan to propose a change to add lines between the points representing HFR values, with a gradient color to better see what the last moves produced. Just this, combined with stacking 3+ frames, should greatly facilitate manual focusing. I also need to show the stacked result instead of the last image in the viewer.

About the Bahtinov mask, there's no underlying algorithm helping for now in the moduke. If someone wants to try, the idea is to spot the three luminosity spikes in the frame and calculate the quality of their intersection.

-Eric

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HEQ5-Pro - Atik 314E - Orion ED80T - DMK21 on Orion 50mm
DIY 3D-printed Moonlite and FWheel RGB/LPR
KStars and indiserver on two Atom 1.6GHz 1GB RAM Linux, VPN remote access

Re:Any experience with manually focusing using the Focus module? 2 months 3 days ago #29527

Thanks Eric,

focussing enhancements are highly appreciated. This is my weakest point in my setup right now. looking forward to my Moonlite clone.

cheers

Amin

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Skywatcher Newton 200/1000 on EQ6-R
Skywatcher Mak 105/1300 on AZ GTi
StellarMate @ Raspberry Pi 3B+
ASI 290 MC guiding cam on APM 60 ImageMaster
Canon 7D DSLR or ASI 183 MC Pro

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