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Forum: Visitors' Center 10-04-2019, 07:41 PM  
Recommended Lens for K3-II Astrophotography Produced Anything But Stars
Posted By kiwi_jono
Replies: 21
Views: 2,278
Mostly covered above already but really the 8mm can be use in this scenario if you want a really wide view but:
1. Probably best to avoid astrotracer (but can be used with some success for smaller exposures say < 20s)
2. Ideally needs to be stopped down to at least f5.6 (otherwise very soft corners and not very sharp center either). This might need to lift your ISO in order to get a short enough shutter time (unless you are going for star trails)
3. Focus needs to be right. The 8mm is known for having an incorrectly set infinity focus stop, and I know mine never focused anywhere near infinity (until I adjusted it). Do some tests in daylight against distant objects.
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