This has nothing to do with Minox cameras, we are talking
about cameras that take the same lenses.

I find it quite alarming that people on here just don't understand
the very simple practical basics of photography and how
to use cameras and lenses in a purely practical sense.

The video above almost fully explains everything you need to
know about DOF and it is by one of the best filmmakers/directors
in the business and we should be grateful that he is willing to
share his knowledge for free. This is a Demo of some of
his work....believe me he knows what he's talking about

He did mention in the video that the only thing that would
change the DOF was moving the camera... which has nothing to
do with format.

I don't think he mentioned that if you wanted to maintain the
same DOF and field of view without moving the camera you would
of course have to change the focal length of the lens.

I shouldn't have to explain to photographers how to adjust
the aperture, but It seems I might have to

Very simply the ratio of APS-C to FF is 1.5 and the
ratio between stops is 1.4..... for practical purposes
we will call them both 1.4, so if I'm using 75mm at f/2.8
on FF for APS-C I would need for the same DOF from the
same spot 50mm at f/2..... the f/2 is needed to keep the
same aperture diam. which as mentioned previously is what
controls DOF. The 1.4/1.5 is constant so we always need
to open up 1 stop. 120mm at f/5.6 on FF would need 80mm
at f/4 on APS-C...... Hardly Rocket Science

I would have thought the extra DOF of APS-C was an
advantage and not a disadvantage. It's only 1 stop
anyway not 4 and it gives you an extra stop of
film/shutter speed if you open up the aperture

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That would mean cropping every single shot!.... OUCH!

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Crop a FF down? you mean to say 15.6 x 23.4.... Isn't that
the same as APS-C? I could use FF for birds and then crop
them all to 15.6 x 23.4 but I can't see any point when I
could use a K-5.

Why have photographers become so poor/incompetent all of a
sudden with 35mm they learnt to fill the frame. Nobody ever
mentioned buying a 6x4.5 so that they could crop it down to
35mm size..... that's what all the lenses were for.

Regarding DOF the end of this video explains it quite well.
Image sensor size does not change DOF
The presenter is excellent, but this video was done in the
freezing cold.. BRR! Worth checking out his other videos.
http://www.youtube.com/watch?v=L0n4pyhx7Dk

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I can't understand why people think they can just guess
Pentax pricing? Give us a long focal length lens
they said....... It will be sold cheap they said.....
End result was the 560mm telecope that will cost about £6K
I wouldn't expect a Pentax FF to be any lower then that

Prices are already at rock bottom... the 35mm film cameras,
Z1-p MZ-s etc. were about £600 years ago. 6x6 cameras were
even dearer a Hasselblad was £500 in the 60's

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With the top 8 best selling cameras in Japan all being APS-C SLR's there's
plenty of life left in the format yet.

APS-C and FF use the same range of focal lengths.
APS-C is just a crop of exactly the same picture on FF
DOF is controlled by aperture diameter not format

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The top 8 selling cameras (excl. compacts) in Japan
last week were APS-C Canikons. Panasonic had a GF5 at
9 and the Pentax Q was at 10

The best selling FF the Nikon D600 just managed to stay
in the top 50 but is going down
The D800 was at No. 60 and also falling.

The Pentax Q10 is selling well No. 28

I would imagine Pentax won't rush into the FF market.
They still need to get the K-5 II into the sales charts
and now have a rethink about the Q10 range.

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Ha! Ha1! Sony have released the Sony RX1 FF with the
most unpopular film lens (35mm) Should have been a
28 or 50mm

Can anyone think of a K mount 35mm from an independent
manufacturer. Vivitar did loads of 28mm's as did
Sigma.


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Nice 5!

Announced by Ricoh not Pentax so it's a specialist camera,
possibly to be sold alongside the FA lenses and cameras
that they already do.

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They've nicked the idea off Sir Clive