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Fred_76

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About Fred_76

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  1. Hi! The petition is now over 6000 supporters, and to celebrate that number, three new translations are available : - german (thanks to Beate Gauthier) : https://www.change.org/p/sony-sternenfresser-d - japanese (thanks to Boris and Makiko) : https://www.change.org/p/sony-remove-star-eater-jp - swedish (thanks to Nisse Rudhag) : https://www.change.org/p/sony-star-eater-se At the time I write these lines, the above petitions counters have not been merged to the petitions counter below. These three new translations join the following: - spanish (thanks to Mrs Degot-Longhi) : https://www.change.org/p/sony-comedor-de-estrellas-sp - russian (thanks to Daria) : https://www.change.org/p/sony-star-eater-ru - english (thanks to Aaron D. Priest, Thierry Legault, and Ian Norman for their review) : https://www.change.org/p/sony-remove-star-eater-en - french : https://www.change.org/p/sony-mangeur-etoiles-fr Don't hesitate to share these links to the forums and social communities you subscribe to ! Clear Sky Fred
  2. A rumor at SonyAlphaRumors says a firmware update may soon be online to solve the Star Eater but ... on mk II cameras only. Why not the mk I ? Source : http://www.sonyalpharumors.com/sr3-sony-will-soon-launch-major-firmware-update-fix-star-eater-issue/ Continue to sign the petition (if not signed yet) or share it !
  3. The petition has now gathered more than 5000 supporters. Many thanks to all supporters. https://www.change.org/p/sony-remove-the-star-eater-on-sony-a7-a7s-r-mk-i-ii-and-a9-cameras It will soon be available in Swedish.
  4. Some statistics about the supporters of the petition. No of supporters counted by Change.org: 4 394 No of doubles: 7 No of supporters without doubles: 4 387 Supporters by country: United States 1167 France 483 Germany 370 United Kingdom 296 Australia 191 Canada 153 Russia 147 Italy 135 Spain 105 Switzerland 94 Netherlands 81 Sweden 60 Austria 58 Belgium 57 Japan 55 Bulgaria 50 Hong Kong 48 New Zealand 48 Denmark 46 Singapore 46 Thailand 43 Taiwan 36 Georgia 35 Finland 34 Czech Republic 33 Norway 33 India 31 Malaysia 31 Poland 27 Portugal 25 Croatia 23 Ukraine 23 Brazil 21 Philippines 20 Greece 18 Indonesia 18 Romania 18 Ireland 17 Mexico 17 Hungary 16 Argentina 14 Chile 10 Turkey 10 United Arab Emirates 10 Slovakia 9 Israel 7 Belarus 6 Lithuania 6 Slovenia 6 Vietnam 6 Réunion 5 Serbia 5 China 4 Cyprus 4 Estonia 4 Qatar 4 South Africa 4 Sri Lanka 4 Kuwait 3 Luxembourg 3 South Korea 3 Armenia 2 Egypt 2 El Salvador 2 French Guiana 2 Greenland 2 Guatemala 2 Iceland 2 Kazakhstan 2 Latvia 2 Oman 2 Pakistan 2 Saudi Arabia 2 Algeria 1 Andorra 1 Azerbaijan 1 Bolivia 1 Colombia 1 Costa Rica 1 Ecuador 1 Ethiopia 1 Faroe Islands 1 French Polynesia 1 Guam 1 Guernsey 1 Iran 1 Isle of Man 1 Kyrgyzstan 1 Lebanon 1 Macau 1 Macedonia 1 Mauritius 1 Moldova 1 Montenegro 1 Morocco 1 Paraguay 1 Saint Barthélemy 1 Sudan 1 Tunisia 1 Uruguay 1 Supporters by continent: Europe 2299 North America 1345 Asia 433 Oceania 241 South America 52 Africa 17
  5. The petition has now been supported by more than 4000 persons! It is available in 4 languages: - english - french - spanish - russian Please: If you speak Spanish or Russian, post the links to the Spanish or Russian versions of the petition on the Spanish and Russian forums / Facebook/ Twitter... about photography, nightscape and astronomy ! Clear Sky to all Fred
  6. The petition just turned 1000 signatures a few hours ago, after being only 4 days online. Thank you all But the "quest" is not ending, the petition shall now be shared as widely as possible, in particular in the printed and online photography and astronomy magazines/blogs. If you know journalists or blogs editors, keep them aware ! You are also invited to ask authors of reviews of the A6000, A6300, A6500, A7 mk I and II, A7S mk I and II, A7R mk I and II and A9 to warn the reader of the Star Eater issue. For example no mention is made on the Star Eater issue in the reviews of DxoMark, Ken Rockwell, DPReview... this is misleading ! One request will not make them change their reviews, but several requests... Fred
  7. Hi all! A petition is now online against the Star Eater. It has been proposed by myself and reviewed by Laurent Laveder, Thierry Legault, Ian Norman, Damian Peach, Aaron D. Priest and Babak Takeshi. We invite you to sign it and share it to the max: http://www.change.org/p/sony-remove-the-star-eater-on-sony-a7s-r-mk-i-ii-and-a9-cameras Clear sky Fred
  8. You will find all details and periods associated to the gears, pulleys, belts and bearings of the HEQ5, EQ6 and AzEQ6 on this page I wrote some time ago : Periods of the various elements of the HEQ5, (N) EQ6 and AZ-EQ6 mounts
  9. You have two suppliers for the belt mod : Tavcso and Rowan. The Tavcso mod uses a 71 tooth belt and the Rowan mod uses a 72 tooth belt. I would prefer the Rowan mod. This is the one I installed on my EQ6 before I switched to an AzEQ6. Rowan explains on their site how to install their kit. It is quite easy and clearly explained. The RA is made of : - 1 motor pulley : T2.5 12 tooth, no flange, 2 setting screws, for 6 mm belt, - 1 worm gear pulley, T2.5 47 tooth, no flange, 2 setting screws, for 6 mm belt - 1 belt galley, about 5 mm dia, with flanges, made of nylon - 1 belt, T2.5, 72 tooth (180 mm long) - 1 mounting plate The DEC axis is similar.
  10. No Wim, I sold all my astro equipment... here in Normandy, we have not enough good nights per year to shoot the deep sky, and I was quite frustrated to have such costly equiment standing by my garage. I had an AzEQ6 with a SW200/1000. The PEC was working correctly with EQMod and the 71t belt, with the period set to 478.7s. I never had the time to change to the 72t belt before I sold my mount, however mechanicaly speaking, this can only improve the PEC as it will compensate the defects of more mechanical elements.
  11. Hi! I'm looking for the type of belt and pulleys that equip the Az-EQ5 mount. On the specification, we can read two settings for the RA axis : - source FLO : Transmission: 135:1 Worm Drive + 36:12 Timing Belt Drive, Gear Ratio: 810 - source User Manual : Transmission 135:1 Worm Drive + 72:12 Timing Belt Drive, Gear Ratio 810 Both have a gear ratio of 810, but this is not compatible with the tooth numbers of FLO 36:12 which gives a gear ratio of 405. However, when you look at the internals of the Az-EQ5 mount, you can see that the worm gear pulley has 36 tooth, not 72. Therefore FLO is correct on the "36 tooth" figure, not on the gear ratio, unless the motor pulley has 6 tooth. But 6 tooth pulley is definitely not a common pulley (on the shelves pulleys start from 10 tooth) ! Skywatcher is not correct on the number of tooth of the worm gear pulley (they say 72 tooth instead of 36). Here is a picture of the belt and pulleys : So : - whether the pulleys are 6:36 and the gear ratio is 810 - whether the pulleys are 12:36 and the gear ratio is 405 I don't have any Az-EQ5 to check, so could someone give here the characteristics of the pulleys and belt of their mount ? - motor pulley number of tooth - worm gear pulley number of tooth - belt number of tooth, distance between tooth (should be 2.5 mm) and width Clear sky Fred
  12. Hi! It should have been better to replace the 71 tooth belt by a 72 tooth belt on the RA axis. The difference in length is minimal (2.5 mm) and the play in the motor's shaft position is enough to tension the belt. The big advantage is that with a 72 t belt, the motor pulley, worm gear pulley and belt are back in the same position every 3 turns of the worm gear instead of 71 turns with the 71t belt. It is then much easier to do a PEC : you just have to enter the period of the 72t belt x 2 (i.e. 1436 s). Here is a list of associated periods. AzEQ6 with 71t belt (original) - motor pulley (12t) : 119.7 s - belt (71t) : 708.1 s - worm gear pulley (48t) : 478.7 s (use this value for PEC but it will not correct belt errors) - combined pulleys and belt : 33 986.9 s AzEQ6 with 72 belt (modification) - motor pulley (12t) : 119.7 s - belt (72t) : 718.0 s - worm gear pulley (48t) : 478.7 s - combined pulleys and belt : 1 436.1 s (use this value for PEC and it will correct all errors of the belt drive) Autoguiding with PEC "on" is possible with EQMod. Fred
  13. I bought the SAM and made a review that I posted on the CloudyNights forum. I warn people expressely NOT TO OVERTIGHT THE SADDLE LOCKING KNOB. This is indeed a poorly designed part of the mount. The knob is screwed in the saddle to lock it on the RA shaft. Only two threads are used in the threaded hole. As the saddle material is quite soft (aluminium), the threads will break one day or one other. I hope Skywatcher will fix soon this mechanical non sense. Here is a picture I took : Therefore you shall be VERY carefull not to over tight this knob as you could easily destroy the fragile aluminum threads. Fred
  14. Fredogoto is happy to let you know that he updated the pan European Light Pollution Maps with the most recent datasets from Corine data land cover. Check here : http://www.avex-asso.org/dossiers/wordpress/?page_id=3273&lang=en_GB A Google map (KMZ) is also available to see the light pollution together with the 3D rendered views : Fred
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