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  • Aster's Photo Challenge • Re: Challenge #57:"So Green Is My Valley"-submissions until July 5th July 5, 2015
    Really nice photos, Sury. The last one is my favorite.Statistics: Posted by Marcell Nikolausz — Sun Jul 05, 2015 12:23 pm
    Marcell Nikolausz
  • Give it Your Best Shot • Re: 6 year old camera and 60 year old lens July 5, 2015
    Looks like it is working pretty well on your A900.Yes, I remember the Vivitar Series 1 90mm f2.5. My recollection is that it was from the late 1970s or maybe early 1980s. My first recollection of a Vivitar Series 1 lens was, I think, the first lens they came out with. It was the 70-210mm […]
    bakubo
  • Give it Your Best Shot • 6 year old camera and 60 year old lens July 5, 2015
    Well, I am not sure about the age of the lens but it is quite old, I am told.A900 with Vivitar 90mm/f2.5 VMC (I believe this is Tokina made), I pickedup on eBay for $60.00. MD mount, used MD/MA adapter with glass. The lightwas bright enough that the loss of quality did not impact adversely, […]
    sury
  • Alpha NEX system • Re: Post about the A7R II up now July 4, 2015
    You could say that Sony wins whatever happens. Neither Nikon or Canon have the fabrication facilities or IP that Sony has accumulated, let alone the broad range of sensor packages whether for phones, video or still photography.The camera production is not of absolute critical importance but does give them extra insight into market end use, […]
    peterottaway
  • Alpha NEX system • Re: Post about the A7R II up now July 4, 2015
    For Sony to take on Canikon and may be even move one of them from pole position is not going to happen over night if at all. Canikon are experiencing marked fall off of DSLR sales world wide and I suspect Sony are as well, but for the time it might take Sony to catch […]
    classiccameras

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Pentax Q up to battle it out with NEX and Ricoh

Although it’s not Alpha, this product announcement – embargoed until 5am UK time, 23rd June, though no doubt by adhering to the embargo we will be a day later than hundreds of websites breaking it – speaks volumes for the impact of Sony’s Alpha system, its interformat lens compatibility, and the future of non-SLR systems.

Kenko, a Hoya group company like Pentax, showed a C-mount digital camera body in February, as a prototype planned for release this summer. Nothing more has been heard of this project. It looked rather like the Pentax in a way.

But Pentax Q is not a NEX competitor as it uses a tiny lens mount and a tiny sensor. It’s more like today’s equivalent of the Pentax 110 SLR system. Only Ricoh currently uses such small sensors in a nominally ‘interchangeable lens’ (not really) camera format. And our own testing of the Fujifilm F550 EXR, with a similar back-illuminated CMOS sensor, indicated that the gap between such microformats and the APS-C subformat is massive.

Just as your first dust spot will be… the anti-dust system is going to have to be 100% efficient, as a single dust bunny landing on a 1/2.3″ sensor will be disaster.

The lens throat is approximately 38mm diameter, very slightly smaller than Leica screw. The back focus is around 9mm, or half the thickness of the NEX body from sensor surface to flange. This will present the anti-shake, anti-dust vibration mounted sensor (on a magnetic carriage) in a fairly exposed ‘well’. The high speed limitation of 1/2,000th is unexpected, but the camera does not use a focal plane or electronic gating; instead it uses leaf-shutter lenses, which due to the small aperture size, can achieve this fast speed. But they can still only manage 1/250th flash sync, when it would be expected that a leaf shutter on this scale could achieve 1/1,000th.

Here is the Pentax Q system, due to go on sale in the Autumn (press release with comments).

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