Do you want a 10.5mm f2 prime?

Recently it turned out, that on my trips, the Panasonic 14mm f2.5 + 0.79X wide angle converter combo is my most used lens. It works, it's not bad, but far from good either. A dedicated, high quality prime around 10.5mm with good f value would be very welcome. Please vote, whether you want one as well.

TheEye wrote:

For years many of us have clamored for a small, fastish 9 or 10mm lens. Neither Oly nor Panny are listening.

Exactly, I followed the discussions. Now I feel the need of having one. Maybe if we keep pushing here, they won't make a new kit zoom or 25mm f1.x again.

However, I'm not quite sure that anybody from Olympus or Panasonic is listening to this forum.

Panny 14/2.5+DMW-GWC1 is my second most often used lens recently (after 20/1.7). Sharpness in the center of the frame is quite good and even sides are decent, only corners are very soft, but I just try to take it into consideration framing my shots. I thought FoV might be too wide for me, but surprisingly I really like it.

The only gripe I have is the size of this contraption. Compared to lone 14/2.5 it's HUGE. I wish Panasonic made pancake lens this wide.

No i want an f4 <300g <500€.

After a rather disappointing Nokton 10.5, which I had great hopes for, I would welcome less extreme, but more competent lens. But f/2 is a bit too slow. Make that f/1.7 with decent quality wide open, and I'm in. I wouldn't mind if it were a bit wider as well.

But I'm not seeing this happening. So I'm warming to the idea of acquiring Samyang 12/2 at some point.

Hen3ry wrote:

I'm fine with 9mm too, need at least f2.8, don't need a pancake

Cheers,

L.

FaFik wrote:

Panny 14/2.5+DMW-GWC1 is my second most often used lens recently (after 20/1.7). Sharpness in the center of the frame is quite good and even sides are decent, only corners are very soft, but I just try to take it into consideration framing my shots. I thought FoV might be too wide for me, but surprisingly I really like it.

The only gripe I have is the size of this contraption. Compared to lone 14/2.5 it's HUGE. I wish Panasonic made pancake lens this wide.

But the 14/2.5 is TINY! What bothers me more is that when you try to unmount it, in some cases the converter starts to detach as well on its own.

There is a Nikon FX lens AF-S 20mm f/1.8. Size is 82 x 84 mm, weight 355 g.

Scaling this down in every dimension by a factor of 2 gives a lens of size 41 x 42 mm, and if all components would be similarly made smaller, the weight would be 44 g (1/8th). Of course, realistically, the lens would be heavier, probably over 100 g, similarly to the 12mm f/2.0 Olympus (size 43 x 56 mm), which is 130 g.

There is another promising combination: GWC1 on Panaleica 15/1.7. Full stop faster and looks much sharper in corners (maybe even in center, but hard to tell from JPEGs): http://kaimax777.pixnet.net/blog/post/190373655-%E3%80%90%E9%96%8B%E7%AE%B1%E3%80%91panasonic-leica-dg-15mm-f1.7-%2B-dmw-gwc1-%E5%BB%A3%E8%A7%92

Flange/registration distance with M43 is 20 mm. For the Nikon mount the distance is 46.5 mm. M43 sensor area is 17.3 x 13 mm, while Nikon FX has 36 x 24 mm. The one thing that is not roughly 50 per cent is the mount diameter. The wikipedia article on the Nikon F-mount says that the mount "external diameter" is 46.5 mm. I am not sure how to measure the corresponding for M43. I just checked the 9-18mm mount, which measures between 50mm (outer) and 40mm. Anyway, the M43 mount diamater seems (relatively) much bigger than the Nikon mount (not 50 per cent, but more like 80 per cent). But this is really the only thing that is not about 50 per cent.

The width of the mount, and the need to have many parts of the lens as thick as (and not 50 per cent only) for bigger lenses (so that things do not bend or break) explains why a 10 mm f/4 is not 44 grams, but 100 g, or possibly even more.

The basic procedure is: take any Nikon FX lens design, scale down _everything_ to 50 per cent. You get a M43 lens for a flange distance of 23.25 mm. Make the mount M43, and add 3.25 mm to the lens to make the flange distance effectively 20 mm. Same of course can be done with Canon EF mount lenses. Flange distance 44 mm. Sensor 36 x 24 mm. Same story.

Loga wrote:

Recently it turned out, that on my trips, the Panasonic 14mm f2.5 + 0.79X wide angle converter combo is my most used lens. It works, it's not bad, but far from good either. A dedicated, high quality prime around 10.5mm with good f value would be very welcome. Please vote, whether you want one as well.

I voted 2nd option (something wider) as I'm happy with my 14mmf2.5+wide 0.76x converter(from Fuji).

A $500 7.5mm f4 rectilinear AF would be nice.

7.5mm non fish eye prime with screw mount filter thread.