[pinholecam]

On the youtube review (posted on the front page of PF here) the guy said he saw no vignetting on his copy.. it should be a solid lens on the K-1.

It was tested here
SMC Pentax DA* 55mm f/1.4 on Sony A7R : ERPhotoReview

[Class A]

It was tested here
SMC Pentax DA* 55mm f/1.4 on Sony A7R : ERPhotoReview

Summary: "The DA* 55mm lens completely covers a full frame image circle with a high level of correction."

The reviewer also remarks that the hood causes slight vignetting when the lens is used on a full-frame camera. So perhaps Pentax will offer this lens with a different hood in the future?

In general, I believe people will have to get used to higher levels of "vignetting" on a full-frame camera as the mount size does not change and one hence does not get the same amount of "over-engineering" of the image circle that true FF lenses embody when used on a crop camera.

[Zygonyx]

Adam posted the list in another thread.. it is a lot of the FA lenses

Indeed, sheesh, thanks Ricoh :

FA* 24mm
FA 28mm
FA 31mm Limited
FA 35mm
FA 43mm Limited
FA 50mm F1.4
FA 77mm Limited
FA* 85mm
FA* 200mm
FA* 200mm Macro
FA* 300mm F2.8
FA* 300mm F4.5
FA* 400mm F5.6
FA* 600mm
FA* 28-70mm
FA* 80-200mm
FA* 250-600mm
(most of these profiles are unique to the K-1)

[wkraus]

Highly improbable, although I assume it will mechanically fit. On the one hand, the finder window of the K-1 is bigger than on the APS-C models, while the finder image is much bigger. On the other, the O-ME53 has a slightly narrow view even on my K-5 II. But you might possibly use it when shooting the K-1 in crop mode, although it might be difficult to read the finder infos.

My assumption concerning the O-ME53 may have been premature. I just tried it on my old Z-1p (with a 0.8x viewfinder magnification) and it does indeed work fine. We'll have to wait and see.

---------- Post added 02-22-16 at 09:29 AM ----------

There is also the possibility of simply going manual crop with the K-1 - using your APS-C lenses in FF mode, seeing what works (or not) and what aperture or focal length gives you results you are happy with, and then manually cropping the 36MP image to suit (if needed).
[snip...]

That's a cool option. In my early test of the Samyang 16mm f/2 APS-C lens I noted "... if and when Pentax offers that FF camera you might also use the Samyang 16mm for a 22 by 22 square format with the FOV of a 40mm lens on the Hasselblad", with top notch image quality.

[kh1234567890]

Ricoh has prepared lens aberration correction in the full frame only for the 200, 300 and 560. All the rest of the DA lenses are listed in the crop lenses table. That doesn't mean DA*55 isn't fully compatible - just that Ricoh hasn't installed lens correction in the FF mode.

Since the correction parameters (polynomial coefficients) are stored in the lens ROM and read from there by the camera, isn't it likely that any pre-FF DA (and probably other) lenses won't be corrected well outside the APS-C area ? The data simply isn't there.

[rawr]

people will have to get used to higher levels of "vignetting" on a full-frame camera

Happily, vignetting has become part of the FF 'look' for many .

Heavy vignetting is also a fact of life for most of the fast FF 'bokeh' primes everyone prizes - eg:

% of light-falloff [from Lenstip.com ].

[Simen1]

Am I right if I think vignetting has a relationship to the how smooth the bokeh are at the edges of out of focus specular lights?

[zoolander]

Well I ain't getting one ! Look at the price for it at CR Kennedy in Australia:

https://pentax.com.au/products/19568

Thats just ridiculous ! In the US you'll pay $1799. The Australia Pentax price for the K-1 is $3188. The current exchange rate for $1799US is $2502AUD (as of 22/02/2016). How is there a $686AU dollar markup ? I mean we're still paying too much for Pentax k-3's. No wonder Pentax gets pulled from stores in my area ...... Teds, Photo continental, Camera House, and JB's dumped Pentax years ago. The K-3 is still the same price as when I bought it a year and a half ago, and CR Kennedy is still selling K-50's.

I constantly see Pentax bodies and lenses going on special in the US, and never here in Aus.

CR Kennedy shouldn't have put the price up by $680 bucks, why not $1680 bucks !

CR Kennedy is gonna send Pentax out of business in Australia. The distributor her in Australia is at fault here. Its just outrageous.

Forget it !

[Zygonyx]

Sounds incredible for sure...

[Class A]

How is there a $686AU dollar markup ?

You are forgetting GST.

The US prices are not directly transferable to countries with a GST scheme. If you consider your 10% GST, then the markup is "only" AUD$ 436. (Thanks to Paul Ewins for correcting my initially incorrect GST assumption).

Now I agree there is still no good reason for such a markup but it seems a little less outrageous then the one you discussed. I guess price differences can be explained by different market structures, competition, etc., blah, blah, but it still sucks.

If you think CRK is bad, you haven't seen our New Zealand distributor Ian R. Little. They haven't even woken up to the fact that a K-1 exists. I've tried numerous times to alert Pentax/Hoya/Ricoh to the fact that Ian R. Little are severely hurting their business, but not even Ricoh seems to care.

P.S.: The recommended retail price in Germany seems remarkably close to the US price (with the standard 19% VAT added).

[Paul Ewins]

You are forgetting GST.

The US prices are not directly transferable to countries with a GST scheme. If you consider your 15% GST, then the markup is "only" AUD$ 313.

Now I agree there is still no good reason for such a markup but it seems less outrageous then the one you discussed. I guess price differences can be explained by different market structures, competition, etc., blah, blah, but it still sucks.

If you think CRK is bad, you haven't seen our New Zealand distributor Ian R. Little. They haven't even woken up to the fact that a K-1 exists. I've tried numerous times to alert Pentax/Hoya/Ricoh to the fact that Ian R. Little are severely hurting their business, but not even Ricoh seems to care.

P.S.: The recommended retail price in Germany seems remarkably close to the US price (with the standard 19% VAT added).

Our GST is only 10%. so it is a $400 premium based on US prices. The price is equivalent to a Nikon Df but less than a D810.

[Topsy]

Rougly the same price here. You should never take US prices as a rule of thumb.
Yours is very close to mine (and the UK price too iirc).
'my' store has to buy it for 100$ more than the US price from the distributor which is crazy, but I expected it to be more expensive so I'm happy.

[Class A]

Our GST is only 10%. so it is a $400 premium based on US prices. The price is equivalent to a Nikon Df but less than a D810.

Thanks!

I looked up the Australian GST before I posted. I can now see that I've misinterpreted a Google summary ("...Australia. GST is a tax of 15% on all goods..."). Should have looked more closely.

[Digitalis]

Tamron has made an announcement .And from the long list of features: there is a distinctive pentax flavour to the features and optical coatings on products being released.

No mention of Pentax versions of these lenses...at least from Tamron.

[Zygonyx]

So, digitalis do you bet with me for K-mount D-FA siblings to come soon?