Sirui VP 1

[scorsesefan]

Has anyone used these? I can’t find a real review online from anyone besides influencers who received them for free from Sirui.

 

[Alex Zeder]

True, I haven't found really helpful samples either, so I bought (not received for free) two of the 24mm lenses and they are better than what I'd have expected in this price range. Haven't really used them so far but here are some first notes without a scientific approach:

• covers VV
• very little breathing over the whole range
• decent pincushion
• smooth out-of-focus rendering
• minimal chromatic aberrations even open
• bokeh not very spectacular
• small poison green flare points (that I will avoid, similar to so many other lenses)
• a bit of halo around spot lights

 

[scorsesefan]

True, I haven't found really helpful samples either, so I bought (not received for free) two of the 24mm lenses and they are better than what I'd have expected in this price range. Haven't really used them so far but here are some first notes without a scientific approach:

• covers VV
• very little breathing over the whole range
• decent pincushion
• smooth out-of-focus rendering
• minimal chromatic aberrations even open
• bokeh not very spectacular
• small poison green flare points (that I will avoid, similar to so many other lenses)
• a bit of halo around spot lights

Thanks. And corner/edge softness wide open? How would you say they compare to the Nisi Athenas or Vespids ? I’m attracted in big part because of the multi mounts as I own a fx6 as well as a Komodo…

 

[Alex Zeder]

Can't compare them because I haven't seen or used the other two, but here are some chart shots at 15 cm close focus distance. Focused at T 1.4 and left unchanged for the other apertures.
Test chart home printed and illumination isn't 100% even either, so take it with a grain of salt.

T 1.4, T 1.8, T 2.0, T 2.4, T 2.8

And some curves for estimating vignetting.
T 1.4


T 1.8


T 2.0


T 2.4


T 2.8

 

[scorsesefan]

Thanks, very helpful. The edges look pretty sharp for budget glass… What exactly are we looking at with the vignetting tests?

 

[Alex Zeder]

What exactly are we looking at with the vignetting tests?

These are the brightness curves left to right for the chart shots, so even if doesn't show the 2D brightness distribution over the sensor area, like corners vs. edges, I think it gives a better representation of the fall off towards the sides when comparing different apertures than blank white frames where you estimate the brightness only visually.

 

[scorsesefan]

These are the brightness curves left to right for the chart shots, so even if doesn't show the 2D brightness distribution over the sensor area, like corners vs. edges, I think it gives a better representation of the fall off towards the sides when comparing different apertures than blank white frames where you estimate the brightness only visually.

Thanks for doing this. I think the 24mm would perform worse than the other focal lengths in these tests? I was thinking of pick up the 24 and 50…

 

[Alex Zeder]

Right, with the 24mm currently being the widest one, it would be unusual if the 35 mm and especially the 50 mm weren't even sharper towards the edges.