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Hi ! I need to collimate my newton (200mm f/4) and I saw somewhere that the secondary mirror need to be a little bit decentered for telescope with big aperture (like f/4). Is it true ? If yes, why ? And is it necessary even with a barlow 3x (f/12) ? Clear skies, Max |
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You can check a thread I started a couple of years ago on Cloudynights: https://www.cloudynights.com/topic/581915-fast-newton-secondary-offset-looking-for-feedbacks/ it has been very useful to me. CS Andrea |
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Please note: The following tables are updated every 24 hours.
| Distinct awarded users | Total awarded images | |
|---|---|---|
| Image of the day | ||
| Top picks | ||
| Top pick nominations |
| Image of the day | Top pick | Top pick nominations | Total submitted | |
|---|---|---|---|---|
| Deep sky | ||||
| Solar system | ||||
| Extremely wide field | ||||
| Star trails | ||||
| Northern lights | ||||
| Noctilucent clouds | ||||
| Landscape |
| Image of the day | Top pick | Top pick nominations | Total submitted | |
|---|---|---|---|---|
| Backyard | ||||
| Traveller | ||||
| Own remote observatory | ||||
| Amateur hosting facility | ||||
| Public amaeteur data | ||||
| Professional, scientific grade data | ||||
| Mix of multiple sources | ||||
| Other | ||||
| Unknown |