Wide angle lens for Sony A73 dilemma.

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davidk24 New Member • Posts: 16
Wide angle lens for Sony A73 dilemma.

Hello,
I i need a little bit of help here.
Im buying a lens mainly for Landscape/astro photography
Im really leaning towards Sigma 20mm f/1.4 which comes out very soon for Sony E.
The problem is, i cant decide if 20mm gonna be wide enough for the work i do, also im very limited by my budget(which is max around 900$) . So i was wondering what was your experience with sigma 20mm especially for landscape and astro work?
On the other hand i was also thinking about Irix 15mm, which is ,yes totally different focal length, but still anyone have any experience how it works on Sony E with an adapter? and which adapter do u recommend and maybe some info on Focus calibration, which according to many users is pretty bad from the factory?

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