Here's a couple more shots with the Nex-7, Speedbooster and various OM mount lenses.
My take on the Speedbooster so far is that it performs pretty remarkably. I'm planning more side by side tests with my lenses vs a Canon 6D but so far I see brilliant center sharpness, and only very slight smearing and CA in the extreme corners.
Finally getting some work in with the pentax 110 70mm. The close focus distance is a obscene 4.5 feet, otherwise, it is a charming lens on NEX 6/7. This is 6 with the rich bw play memories app. Really wish there was a way to do raw in this mode, but alas, it is jpg only.
The Nikon 10.5 cm takes some getting used to on lens baby, but the rewards are there if you are patient and willing to spend some time with a scene… F3 Deep BW IR
Lucky the wind was up this week and I am continuing good work with the ZF 25mm and Lensbaby T/S. NEX F3 IR.
Jim Schemel wrote:
alan m - those look very sharp for wide open.
Just the first two are wide open, but yeah, not bad. (Full disclosure - I'd mis-mounted the lens and thought it was stopped down a little! Probably wouldn't have shot it wide open otherwise!!) Verybiglebowski from DPReview NEX forum did a 50/1.4 wide-open test and found the FDn the best for 1.4 sharpness (not testing anything else) on his blog: http://verybiglobo.blogspot.ie/
Some shots with the Nex-7 / Speedbooster / Sigma mini-wide 28mm combo. I found the only way to really capture these huge redwoods was to stitch multiple wide images to create a pseudo fish-eye POV. I'm amazed at how well Hugin can stitch these complex images, especially given how far the angle of view changes. The level of details in these at 100% is quite impressive.
@Tarocco: I am surprised to not see that heavy loss of image quality at the edges of the picture, as in a review of the MB speedbooster by a Fuji user was reported:
Kruschtel wrote:
@Tarocco: I am surprised to not see that heavy loss of image quality at the edges of the picture, as in a review of the MB speedbooster by a Fuji user was reported:
Some of the corners are cropped due to stitching but in general I find they're pretty good, even wide open. I also use most of my lenses on a Canon 6D so I'm in the process of making more comparisons. I do see an odd effect where the very center has higher resolution than the rest of the frame, even stopped down - but it's more complex than just 'bad corners'. I think some (not all) of the image quality limitations attributed to the Speedbooster are really just lens limitations.
Here's another stopped down Nex-7 / Speedbooster stitch:
Tarocco wrote:
Some of the corners are cropped due to stitching but in general I find they're pretty good, even wide open. I also use most of my lenses on a Canon 6D so I'm in the process of making more comparisons. I do see an odd effect where the very center has higher resolution than the rest of the frame, even stopped down - but it's more complex than just 'bad corners'. I think some (not all) of the image quality limitations attributed to the Speedbooster are really just lens limitations.
I expected the central higher resolution boost from my Zhongyi FD Lens Turbo, but have also been pleasantly surprised by good edge (if not extreme corner) performance from my FDs. Obviously the lens quality has a lot to do with this! But the one-size-fits-all approach of the LT/SB can surely not produce the same performance on every lens, regardless of each lens' unique field curvature, distortion etc? Anyway, the edges of this FDn 50/1.4 + LT shot at around f2.8 (un-cropped, as far as I remember) are fantastic, especially as I wasn't expecting or hoping for them to be this good! Posting large, just to look at sharpness (embarrasingly, I've only just noticed sharpening haloes and green fringing. Must revisit this one!):
