A fast f2.0 12-60 zoom!

Started Dec 11, 2013 | Discussions
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Advent1sam
Advent1sam Senior Member • Posts: 2,945
A fast f2.0 12-60 zoom!

Not weather sealed, just decent optics and F2.0 all the way, how big would it be for m43?

Jouko Senior Member • Posts: 1,369
Re: A fast f2.0 12-60 zoom!
2

Check the 12-60 f2.8-4 and 14-35 f2 for FT -format... The f2-version would be close to the latter one, weather sealed or not. Sealing does not make the lens that much bigger, the large aperture and long zoom-range will. And "decent " optics... to seel at all, that lens should be perfect for IQ. Nobody would carry that around, if it was not perfect.

You are not asking for a compact zoom... Nor cheap.

Jouko
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Advent1sam
Advent1sam OP Senior Member • Posts: 2,945
Re: A fast f2.0 12-60 zoom!

I would probably settle for a 14-50 f2.0 actually if it was not much bigger than the 12-40?

Jouko wrote:

Check the 12-60 f2.8-4 and 14-35 f2 for FT -format... The f2-version would be close to the latter one, weather sealed or not. Sealing does not make the lens that much bigger, the large aperture and long zoom-range will. And "decent " optics... to seel at all, that lens should be perfect for IQ. Nobody would carry that around, if it was not perfect.

You are not asking for a compact zoom... Nor cheap.

Jouko
'The best camera in the world is the one you have with you when you need it'
http://lehtokukka.smugmug.com/
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s_grins
s_grins Forum Pro • Posts: 10,389
Re: A fast f2.0 12-60 zoom!

Did you see 2.8/12-40?

Add 20mm to the length and F.8 to diameter.

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broody Contributing Member • Posts: 674
Re: A fast f2.0 12-60 zoom!
1

This lens would be gigantic. Just look at the much shorter 14-35mm SHG and 18-35mm Sigma for comparison. Those dwarf even F/0.95 lenses in size.

The 12-40mm Pro already pushes the limit of how large a M43 lens can reasonably be. Anything larger than that and you're better off using a FF body.

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jkrumm Veteran Member • Posts: 9,092
Re: A fast f2.0 12-60 zoom!

Definitely very big, even though M43 lenses benefit from not having to do so much optical correction. I'd be surprised to see anything faster than the current f2.8 zooms, unless it were a short range and large. Maybe Sigma could make it.

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John Krumm
Juneau, AK

Valentinian
Valentinian Contributing Member • Posts: 702
Re: A fast f2.0 12-60 zoom!

jkrumm wrote:

Definitely very big, even though M43 lenses benefit from not having to do so much optical correction. I'd be surprised to see anything faster than the current f2.8 zooms, unless it were a short range and large. Maybe Sigma could make it.

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John Krumm
Juneau, AK

Why would they?

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Advent1sam
Advent1sam OP Senior Member • Posts: 2,945
Re: A fast f2.0 12-60 zoom!

Valentinian wrote:

jkrumm wrote:

Definitely very big, even though M43 lenses benefit from not having to do so much optical correction. I'd be surprised to see anything faster than the current f2.8 zooms, unless it were a short range and large. Maybe Sigma could make it.

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John Krumm
Juneau, AK

Why would they?

So we could buy it! seriously an f2.0 zoom for m43 seems missing to me, even if it is only 18-35 like the 1.8 for aps-c, it just seems why not put something really really cool out there.

honeyiscool
honeyiscool Senior Member • Posts: 1,375
Re: A fast f2.0 12-60 zoom!

broody wrote:

This lens would be gigantic. Just look at the much shorter 14-35mm SHG and 18-35mm Sigma for comparison. Those dwarf even F/0.95 lenses in size.

The 12-40mm Pro already pushes the limit of how large a M43 lens can reasonably be. Anything larger than that and you're better off using a FF body.

A, say, fast-focusing 12-25mmmm f/2.0 would replace three lenses for me, and each of those lenses are worth $799 (12mm) + $529 (25mm) + $499 (17mm) = $1827, so even at $1499, it would be a keeper.

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sarlo100 Senior Member • Posts: 1,323
Re: A fast f2.0 12-60 zoom!

Advent1sam wrote:

Not weather sealed, just decent optics and F2.0 all the way, how big would it be for m43?

Every stop doubles the amount of light hitting the sensor.  There's a reason virtually all zooms stop at f/2.8 - the jump to f/2 is a massive one.  Your lens would be a monster.

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Advent1sam
Advent1sam OP Senior Member • Posts: 2,945
Re: A fast f2.0 12-60 zoom!

sarlo100 wrote:

Advent1sam wrote:

Not weather sealed, just decent optics and F2.0 all the way, how big would it be for m43?

Every stop doubles the amount of light hitting the sensor. There's a reason virtually all zooms stop at f/2.8 - the jump to f/2 is a massive one. Your lens would be a monster.

I was joking about 12-60, but something in the 12-35 or 14-35 or 14-40 must surely be possible and sub 600g? the siggy is faster and covers aps-c and isnt so big?

http://www.dpreview.com/lensreviews/sigma-18-35-1-8/2

radsaq
radsaq Contributing Member • Posts: 702
Re: A fast f2.0 12-60 zoom!

Advent1sam wrote:

sarlo100 wrote:

Advent1sam wrote:

Not weather sealed, just decent optics and F2.0 all the way, how big would it be for m43?

Every stop doubles the amount of light hitting the sensor. There's a reason virtually all zooms stop at f/2.8 - the jump to f/2 is a massive one. Your lens would be a monster.

I was joking about 12-60, but something in the 12-35 or 14-35 or 14-40 must surely be possible and sub 600g? the siggy is faster and covers aps-c and isnt so big?

http://www.dpreview.com/lensreviews/sigma-18-35-1-8/2

"Isn't so big?" Compare that to:

http://www.dpreview.com/previews/panasonic_14_2p5_100-300_4-5p6/2

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Marcello Zini
Marcello Zini Contributing Member • Posts: 903
Re: A fast f2.0 12-60 zoom!

Valentinian wrote:

jkrumm wrote:

Definitely very big, even though M43 lenses benefit from not having to do so much optical correction. I'd be surprised to see anything faster than the current f2.8 zooms, unless it were a short range and large. Maybe Sigma could make it.

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John Krumm
Juneau, AK

Why would they?

I may be seriously wrong but i think that IF Sigma would translate the apsc 18-35 into a roughly equivalent 13-27 f1.8 constant and eventually a bit smaller than  the 18-35 - but even as big - it would be a big hit on the market. I would buy one

Marcello

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Jouko Senior Member • Posts: 1,369
Well...

There are the FT-zooms 14-35 and 35-100 f2 that can be used with mFT-cameras. I don't have either, but from the comments on these pages they sure deliver the best IQ and work quite nicely with EM1.

Not cheap, not compact, but the fastest zooms there are exept the Sigma.

Fast zoom won't be compact. Or it won't deliver good IQ. And it won't be cheap, not even reasonably cheap.

Jouko
'The best camera in the world is the one you have with you when you need it'
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bobn2
bobn2 Forum Pro • Posts: 43,318
Re: A fast f2.0 12-60 zoom!

Advent1sam wrote:

Not weather sealed, just decent optics and F2.0 all the way, how big would it be for m43?

Upper limit in size would be the Nikon 24-120/4 which gives the same range of angles of view and same apertures. That lens is 84mm in diameter and extends 143mm from the image plane (you really have to take the full image plane to front element distance into account when considering the size of a lens). I would think that the mFT version could be smaller than that, because it needs to cover a smaller image circle and because it can have lements closer to the lens (in fact your lens could be made just as the Nikon lens with a focal reducer on the back, and the focal reducer would pull the lens in a bit compared with the 46.5mm register of the Nikon. So, optimised design without the focal reducer, I'm saying maybe 123mm from the image plane. Big, but not unuseable.

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bobn2
bobn2 Forum Pro • Posts: 43,318
Re: Well...
1

Jouko wrote:

There are the FT-zooms 14-35 and 35-100 f2 that can be used with mFT-cameras. I don't have either, but from the comments on these pages they sure deliver the best IQ and work quite nicely with EM1.

Not cheap, not compact, but the fastest zooms there are exept the Sigma.

Not the fastest. The FF f/2.8 zooms project the same amount of light on the sensor as an f/1.4 zoom would on micro Four Thirds.

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Bob

Hen3ry
Hen3ry Forum Pro • Posts: 15,999
You guys! One stop more! Then you will want f1.4

What for? You wont take one better picture.

Why not collect crystal or cut glass or something?

Or tupperware. The salad spinner is magic.

Cheers, geoff

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