apicius9
Mu-43 Veteran
I was just playing around a bit and will have to try with different motives and different settings, but here is a first impression of what I did:
Computar 12.5/1.3 and Pan 14-45 by mgapicius, on Flickr
Here we have on the left a Computar 12.5/1.3 c-mount lens with a Nikon WE-C68 wide angle converter, to the right the 14-45 kit zoom with the Oly WCON-08 wide angle converter. I just wanted to see what these reasonably cheap converters do (I paid under $80 for both, shipped, from ebay).
I don't want to do a scientific test here, my question is what I can get out of these lenses in real life conditions. All shot handheld with the GH2, trying to keep the tip of Diamondhead reasonably in the center. The shots with the Computar showed heavy vignetting, and I cropped them to the point where I thought they might be useful. I set the aperture at F8 in the 16:9 format and let the camera do it's thing otherwise. Nothing done to the pics except converting to DNG in LR3 and cropping for the c-mount pictures.
So, here we go:
Panasonic kit lens at 14mm
14-45mm at 14mm by mgapicius, on Flickr
Panasonic kit lens at 14mm plus Oly WCON-08
14-45mm at 14mm plus Oly WCON-08 by mgapicius, on Flickr
Computar at 12.5mm
Computar 12.5mm by mgapicius, on Flickr
Computar at 12.5mm plus Nikon WE-C68
Computar 12.5mm plus Nikon WC-E68 by mgapicius, on Flickr
So, what's the prelimiary conclusion? Not surprisingly, the kit lens has the best IQ. The Oly WCON-08 doesn't do anything dramatic, it does increase the angle and brings it to approx. 11mm with a bit of loss in IQ.
The Computar holds up really well IMHO and after cropping out the vignetting it comes to about the same angle as the kit lens. With the Nikon converter, the vignetting is stronger, and it makes more sense to crop it in 4:3 format. When you do that, you don't gain all that much horizontally, but there is a definite increase in the vertical coverage.
So, this does not replace the MFT wide angle zooms or stitching 2 pictures together. But I find these first examples at least interesting enough to play around more. The kit lens combo seems best, but at a cost: Compared to the c-mount combo it is much larger, heavier and slower (!). The main limitation here is that the quality falls off toward the corners and that is impossible to see in these pictures, so I will play more with more complex motives.
I'm happy about comments - or suggestions for better 'cheap wide angle solutions'. Oh, and even if the lenses don't make you envious, the pics were taken today, Christmas eve at a very pleasant 80F :smile:
Stefan
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Computar 12.5/1.3 and Pan 14-45 by mgapicius, on Flickr
Here we have on the left a Computar 12.5/1.3 c-mount lens with a Nikon WE-C68 wide angle converter, to the right the 14-45 kit zoom with the Oly WCON-08 wide angle converter. I just wanted to see what these reasonably cheap converters do (I paid under $80 for both, shipped, from ebay).
I don't want to do a scientific test here, my question is what I can get out of these lenses in real life conditions. All shot handheld with the GH2, trying to keep the tip of Diamondhead reasonably in the center. The shots with the Computar showed heavy vignetting, and I cropped them to the point where I thought they might be useful. I set the aperture at F8 in the 16:9 format and let the camera do it's thing otherwise. Nothing done to the pics except converting to DNG in LR3 and cropping for the c-mount pictures.
So, here we go:
Panasonic kit lens at 14mm
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14-45mm at 14mm by mgapicius, on Flickr
Panasonic kit lens at 14mm plus Oly WCON-08
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14-45mm at 14mm plus Oly WCON-08 by mgapicius, on Flickr
Computar at 12.5mm
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Computar 12.5mm by mgapicius, on Flickr
Computar at 12.5mm plus Nikon WE-C68
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Computar 12.5mm plus Nikon WC-E68 by mgapicius, on Flickr
So, what's the prelimiary conclusion? Not surprisingly, the kit lens has the best IQ. The Oly WCON-08 doesn't do anything dramatic, it does increase the angle and brings it to approx. 11mm with a bit of loss in IQ.
The Computar holds up really well IMHO and after cropping out the vignetting it comes to about the same angle as the kit lens. With the Nikon converter, the vignetting is stronger, and it makes more sense to crop it in 4:3 format. When you do that, you don't gain all that much horizontally, but there is a definite increase in the vertical coverage.
So, this does not replace the MFT wide angle zooms or stitching 2 pictures together. But I find these first examples at least interesting enough to play around more. The kit lens combo seems best, but at a cost: Compared to the c-mount combo it is much larger, heavier and slower (!). The main limitation here is that the quality falls off toward the corners and that is impossible to see in these pictures, so I will play more with more complex motives.
I'm happy about comments - or suggestions for better 'cheap wide angle solutions'. Oh, and even if the lenses don't make you envious, the pics were taken today, Christmas eve at a very pleasant 80F :smile:
Stefan