Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  11 bet Cas  ·  14 lam Cas  ·  17 zet Cas  ·  18 alf Cas  ·  24 eta Cas  ·  26 ups01 Cas  ·  28 ups02 Cas  ·  30 mu. Cas  ·  33 tet Cas  ·  Achird  ·  Caph  ·  Cassiopeia  ·  IC 10  ·  IC 1590  ·  LBN 578  ·  LBN 591  ·  LBN 594  ·  LBN 595  ·  LBN 597  ·  LBN 599  ·  LBN 603  ·  LBN 604  ·  LBN 605  ·  LBN 607  ·  LBN 610  ·  LBN 611  ·  LBN 615  ·  LBN 616  ·  LBN 621  ·  LDN 1265  ·  And 30 more.
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Cassiopeia Area, Sigga
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Cassiopeia Area

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Cassiopeia Area, Sigga
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Cassiopeia Area

Equipment

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Acquisition details

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Description

So after few failures with this lens due to bad focus I try methodical method of:

- F5.6 rather than wide open, ISO 400

- sit optics outside for temperature equilibrium, I focused lens when first carry outdoors, 2 hours later after equilibrium I come back, out of focus badly, lesson learned

- carefully focus on bright mast light on fishing boat that was anchored in fjord a few km away

Much better result! Now Pentium 4 supercomputer grinding away to stack 60+ subs which conveniently give me time to make lunch! After multi hour wait, lunch, snacks, a beer this is final of 44x131s, F5.6, ISO 400. No IOTD but I pretty happy with result and good learner experience for future regarding focus and more methodical process.

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