yabokkie: > sdyue,
a simple rule that solves all the equivalent calculations is to use sqrt(sensor-area-ratio) as a factor for both focal length and f-number, like
Pana PZ 14-42/3.5-5.6 ------> 27.4-82.3/6.9-11.0 equiv. Canon G1 X (15.1-60.4/2.8-5.8) ------> 28-112/5.1-10.5 equiv.Sony E18-55/3.5-5.6 ------> 27.6-84.4/5.4-8.6 equiv.
so G1 X is the fastest/brightest one (lower noise, shallower field) at 28mm FOV with an equivallent f-number of f/5.1 (not fast/bright at all in 35mm FF standard) .
the "equivallent f-number" is really the aperture size at a given FOV, which determines everything f-number does like SNR (shot noise) or DOF for instant comparison across different formats.
I'm starting to get fed-up with all this. the equivalent aperture does not determine everything - exposure triangle is still ISO-Aperture-Shutter Speed, the aperture is the actual none of this equivalent nonsense. equivalence is fine for DOF, but that's it
hope this helps
CDMc: ? they're available all over the UK ? Many of the main online retailers have them available, and prices are starting to reflect that supply
They are available all over -
fotosense - i've used them personally very goodMathers - very good reputationSRS microsystems - ditto
kon23: Nice to see them on the ball with updates.I've got my eye on a Panasonic GX1 or Sony Nex 5n.At the moment in the UK you cannot get either of these for loving or money!Sony lost their factory that supplies the sensors for the Nex 5n in the tsunami and I think Panasonic have some kind of major problem too.
I've been told everywhere that a Sony Nex5n with twin lens kit or the GX1 with X lens won't be coming into stock until late February. Even then, it's not guaranteed.
? they're available all over the UK ? Many of the main online retailers have them available, and prices are starting to reflect that supply
TxCamFan: This wasn't up yesterday. Why did you back date it? It would be nice to see the announcements with the newest on top regardless of how exciting they are.
Consipiracy Theory anyone? have a look at the release list for Panny, these are not even on it.
Edit: Just checked - still not showing in the product list
This confirms a fewthings for me, and one of the unsung reasons why i'm so happy with m43 - CDAF - the focus is in a different league than the PDAF on my old 40D.
Once the issue of better CAF is solved, I wonder if Canikon will move to a similar system, after all, the returns and services must cost them a fortune, else why would they have included micro-adjust.
Carsten Saager: Interesting to see that even with the penalty of the translucent mirror the A77 wipes the floor with the APS-C competition - the 5dmkII only does a little bit better (thanks to its full-frame sensor)
Good job Sony! Curious what Canikon have up in their sleeves to counter that - though it won't last for long. In 5 years I'll find myself hard pressed to add to my Nikon gear if Sony can keep up this innovation speed (and in 10 years Canikon will become just nostalgia)
Not sure where you are looking? not seeing that at all
I compared to the GH2 in RAW and JPG at 1600 and 3200 - a pixel too far?