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Tried to use my new Flat 61 R last night and couldn’t get to focus. I’m very familiar with the WO adjustable flatterers but just couldn’t get to focus. Im using a ZWO ASI 2600 with filter wheel and OAG and have the adjustable flattened set to 1 mm as suggested. That gives the 56 mm back focus. To reach focus I’d need to go negative on the focus tube - ie fully retracted still too far away!!! I ended up switching back to my 61A which works fine at 31 mm of extension. Im hoping I’ve just missed something! I did switch out the rotator from the 61R with that from the 61A to get closer but still no deal. Thanks John |
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Ok I fixed it for future reference the focused extension with the Flat 61 R is around 9 mm and the 61 A is 30 mm. My filter wheel was clashing with the dove tail bar preventing me reaching the 9 mm - something that wasn’t obvious in the dark at 20 f. Another classic it’s dark and I’m cold error! John |
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| I'd be curious what you think of the Flat 61R. I'm having some serious coma and star distortion with my ZS61 and ASI2600. Contacted WO about a possible defect in the flattener. They gave me some things to try and so I'm waiting for clear skies to try again. |
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Michael I was able to get the set up working tonight I used the 1 mm off set recommended by WO and the field looked OK. I have a bit of tilt in one corner but I think the flattener is working just fine. Good luck with yours John |
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John, After re-measuring everything and adding the ZWO Tilter to the mix I was finally able to get the Flat61R working. |
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Hi! Is still everyone happy with the reducer? Would someone want to sell his? Thanks! Carles. |
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Carles Dalmau: I have the reducer. I struggled quite a bit finding a good backfocus. Then there was some tilt. After adding the Neumann Tilter, I was getting acceptable results. (I prefer spacers instead of adjustable reducer / flattener). Then I had some pinched optics as well and I had to loosen the set screws a bit. After sorting out all the little problems, the scope performs very well. Selling the reducer - nope, now the system is running quite well and I plan using it for some widefield images again. Rob |
