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Canon RF 24-240mm f4-6.3 IS USM coming soon
#58
(09-09-2019, 09:53 AM)Klaus Wrote:
(09-09-2019, 07:31 AM)Brightcolours Wrote: Look at the prices of non-crop MF sensors, and you can start to realise why no one will come with "square sensors".

By the way, Panasonic has used some oversized sensors in some of its higher end MFT cameras, where 4x3 and 3x2 aspect ratio shooting use different "optimal" areas.

Com'on - a square-shaped "FF" sensor would only add marginal costs and it would be negligible for APS-C or MFT sensors. 

And yes, I never understood why Panasonic abandoned their multi-format sensor. I loved it.
Only marginal costs?

FF is 36x24. You want it to do 1:2.35 too. Lets take the diagonal as reference: 43.27mm. That means that instead of 36x24mm you have a 40x40mm sensor.
That is a 85,2% increase in sensor size. You lose even more due to that square sensors on a round wafer give more unusable area on every wafer compared to 3x2 aspect ratio sensors.

So twice as expensive is not really marginal. And that is disregarding the cost for AA filters... The reason medium format sensors always have been AA filterless is because AA- filters are difficult and expensive to make (the same cost as the sensor, to produce), so add to that double the cost for AA-filters and the cost is even less "marginal".

The reason Panasonic abandoned those sensors is most probably cost, most people do not understand the why and are not prepared to pay more for the expensive Panasonic to be able to shoot 3x2 without it being a simple crop from 4x3.

(09-09-2019, 09:31 AM)JJ_SO Wrote:
(09-09-2019, 07:25 AM)davidmanze Wrote: ... but no-one on this planet would doubt the achievements of Ansel Adams !!
What has Ansel Adams to do with sensor ratios? Or the coincidentally "choosen" paper ratios? Or the Amercian way of going 4×5 ratios for negatives and print papers? While someone in Europe went for 3:4 ratios (9×12, 18×24) and also 4:5 (20×25, 24×30), but 2:3 ratios are rare (I only know 20×30, 10×15 is a fake, as it's 105×147 mm = 5:7)
And if you never used a 4:3, you don't need to grab a µ 4/3, you can also rent a "large format" Fujifilm (hahahaha), they also use 4:3 sensors.
Medium format 6x9 used to be a normal MF format. I have one of those.

3x2 135 format was 3x2 because What later became Leice decided to use 35mm film and do double frame (twice 18x24), resulting in 36x24mm. This format became popular because it had many advantages over MF film (camera size and cost to name but two), with first Leica beginning the 135 format range finder revolution, and later the Japanese SLRs from Nikon, Minolta, Canon and Pentax to name a few.

4x3 in MFT and "compact digital cameras" has its origin in the TV aspect ratio. Computer monitors used to have the same 4x3 aspect ratio as TV screens, and it only made sense to make the digital cameras of the 90's have the same format.

Nowadays, 4x3 makes less sense as computer and TV screens have gotten wider aspect ratios.
  


Messages In This Thread
RE: Canon RF 24-240mm f4-6.3 IS USM coming soon - by miro - 07-05-2019, 07:35 AM
RE: Canon RF 24-240mm f4-6.3 IS USM coming soon - by davidmanze - 09-09-2019, 07:25 AM
RE: Canon RF 24-240mm f4-6.3 IS USM coming soon - by davidmanze - 09-09-2019, 10:26 AM
RE: Canon RF 24-240mm f4-6.3 IS USM coming soon - by Brightcolours - 09-09-2019, 10:44 AM

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