October 30, 2014, 01:47:58 PM

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Topics - nubu

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Third Party Manufacturers / Sigma 50/1.4 ART Astrophotography Test
« on: June 07, 2014, 12:18:10 PM »
I'm quite happy with my new sigma 50/1.4  art  now replacing the canon 50/1.2 in my collection. Use it on my 5D3 and 5D2 (astromod) bodies.

Wanna share my quick and personal test for the best aperture of my new Sigma 50/1.4 ART on my astro-modified canon eos 5D3. The pics are showing stripes (centre and below extreme corner lower right) with apertures from 5.6, 4, 2.8, 2, 1.4 with equivalent exposures between 160-10s. raw developed in DXO with vignetting and distortion switched off! My personal conclusion: vignetting invisible at 2.8, perfect sharpness and aberrations at 4.0 but already very good and quite usable for astro work at 2.8 - this is two stops better than my (now sold) 50/1.2 copy...

(the strange color comes from the UHC clip in filter and the high background)

pic 1: centre (5.6-1.4) , 100%
pic 2: corner (5.6-1.4) , 100%

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Because I have the attach several cables under an L-bracked on a eos 5DII and 5DIII I wonder if I could remove the rubber terminal covers in a nondestructive way (to cut the rubber connectors would be easy) in order to save space...

Thanks for your input!

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Software & Accessories / Canon DPP Version 3.13.45 update!
« on: September 20, 2013, 08:38:00 AM »
Canon DPP Version 3.13.45

- Supports images taken with EOS 70D, EOS Kiss X7 / EOS Rebel SL1 / EOS 100D, PowerShot G16, PowerShot S120.
- Supports new lens (EF-S 55-250mm f/4-5.6 IS STM, EF 200-400mm f/4L IS USM Extender 1.4X, EF-M 11-22mm f4-5.6 IS STM).
- The accuracy of the white balance in M-RAW and S-RAW images has been improved.

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