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Showing posts with the label Pentax PK

Canon 6D vs NEX-7 with Speedbooster

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Canon 6D vs Sony NEX-7 with Metabones Speedbooster
Tarocoo wanted to see what the NEX-7 with the Canon EF to E-mount Speedbooster can do against his full frame Canon 6D. He had access to a multitude of manual focus lenses which can be used on both E-mount and EF mount (EOS). The Speedbooster's final EFOV on the NEX APS-C sensor is about 1.1x the focal lenght - so the EFOV is close to the Canon 6D with the full frame sensor. The lenses used are:

Sigma 24mm f/2.8Sigma 28mm f/2.8Olympus 35mm f/2.0Sigma 50mm f/1.4
The images will show the whole scene at wide open to an aperture of f/11. It will be followed by center and corner crops at same aperture range. Here we go...

Canon 6D vs NEX-7 Speedbooster Sigma 24mm f/2.8










Canon 6D vs NEX-7 Speedbooster Sigma 28mm f/2.8









Canon 6D vs NEX-7 Speedbooster Olympus 35mm f/2.0












Canon 6D vs NEX-7 Speedbooster Pentax 50mm f/1.4

Sony A7r vs 50mm Lenses by geesbert

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The 50mm Lens Candidates
geesbert puts the new Sony A7r up against a multitude of 50mm lenses. The list of thirteen (13) 50mm lenses used on the Sony A7r is as follows:
Canon EF 50mm f/1.2Canon 45mm f/2.8 Tilt/ShiftLeica 50mm f/2.8 Elmar MLeica 50mm f/3.5 Elmar ScrewmountLeica 50mm f/2 Summicron MLeica 50mm f/1.4 Summilux MOlympus OM 28-48mm f/4Olympus OM 50mm f/1.4Olympus OM 50mm f/2 MacroPentax SMC-A 50mm f/1.4Minolta Rokkor 58mm f/1.2Minolta 40mm f/2 Rokkor-MSony 50mm f/1.8 E-mount
geesbert has a great setup which shows the lens being tested. He took shots from wide open up to f/5.6 aperture.

Sony Alpha 7r vs 50mm Lenses
Thanks geesbert!



Sony NEX-5N and Pentax K-01 Camera

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Sony NEX-5N vs Pentax K-01 Front ViewHere is the Sony NEX-5n with the Pentax K-01. They are only associated since they are mirrorless but that is where the relationship ends.

The Pentax K-01 by Marc Newson is not really a Sony NEX competitor. It's closely related to the Pentax K-5 but without a viewfinder (optical nor optional evf) and autofocus speed. The K-01 and the K-5 use the Pentax K mount and share the same lens system. The K-01 loses the mirror box of the K-5 which makes it less expensive at $899 with the 40mm lens (60mm equivalent FOV) compared to $1300 for the K-5 with an 18-55mm lens. The closes Sony product is the SLT-A65 which is $1050 with the 18-55mm lens.

Sony NEX-5N vs Pentax K-01 Top View

Sony NEX-5N vs Pentax K-01 Back View

NEX-5 with Pentax DA 21mm Limited Lens

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Sony NEX-5 and the Pentax DA 21mm f/3.2 AL Limited Lens

GuyV posted some examples of his Sony NEX-5 and the Pentax DA 21mm f/3.2 AL Limited lens The Pentax 21mm is a pancake lens for Pentax dslrs. The lenses do not have aperture rings therefore the Pentax DA to Sony E-mount lens adapter has an aperture controller.
Here are some sample photos taken with the Pentax DA 21mm on the NEX-5.







Pentax DA to E-mount Adapter Aperture Setting at 3



Check out larger samples of the NEX-5 and the Pentax 21mm F/3.2 AL Limited Lens at GuyV's gallery.

Sony NEX Pentax K Mount PK Lens Adapter

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And the last of the new Sony NEX lens adapters for today is the Sony NEX E-mount to Pentax K Mount Lens Adapter. We are not familiar with K Mount lenses so we don't have any lens recommendations.


Check out the Sony NEX Pentax K Mount PK Lens adapter eBay auction.

Here is a list of Pentax K Mount Lenses.