Barry Pearson

Have a look here, it is a useful place to go for all questions like that: K-1 Laboratory

Yup! Looks like 2017 or later:

In my opinion, the DA* 60-250mm is one of the best lenses Pentax ever produced for APS-C. (With or without the 1.4x Converter).

This is how Ricoh present them: Blue = "f/2.8 luminance flux linear sensor"

This comment will probably put me way outside the mainstream! I shoot a lot of action: airshows, motor sports, some bird photography. I've done so with most of the Pentax flagship APS-C cameras, ...

I haven't commented so far, because although I have the D FA 100mm f/2.8 WR Macro, I've never used it for serious street photography. I normally use a zoom lens. If you have definitely ruled that ...

Here are two lenses that I have used a lot. They may sound as though they are old-style kit lenses, but are both high-image-quality lenses that just happen to be mid-range zooms like typical kit ...

True! Or, on the K-1, press the "AF Mode" button, and the current overlay and AF points (set from the 5th page of the Menu) light up in red in the viewfinder. I mainly use it retrospectively to ...

I extracted the image from page 17 of the Operating Manual and scaled it to the right size. In fact, it remains as one of the layers in the "Miscellaneous Layers" layer group. I got the "AF Cross" ...

Wonderful! Thank you for that. Even Photoshop helps with "Quick Export as PNG". It takes about 10 seconds to generate a new Lightroom overlay from my PSD! So do I now, plus the basic frame. Now I ...

This post may help for the K-1 If the second photo there (representing the full K-1 frame) doesn't help, you could download the PSD file and use it on some of your own photos. I have no knowledge ...

I don't think they all have much DOF. But perhaps that is because I've studied the originals at 1:1. And these particular subjects can be obscured by mud! Remember that AF often can't be judged by ...

This is so esoteric that probably there only two people on the planet who are interested. And the other one doesn't speak English! Have a look at the first photo below. It has the 9 center AF ...

I'm getting the feeling that once you start having a large zoom range with FF lenses you start to pay the price in cost, weight, and size. I used to cover a large range on APS-C cameras with the DA ...

Chuckle! I'm pretty sure that such an extension to the zoom range would make it bigger, heavier, and more expensive. (And/or it might have an impact on the optical quality). I think when Ricoh were ...

Personally, I doubt if we will see such a lens in the next year or two. (It would presumably be bigger, heavier, and more expensive than the 28-105mm). I've seen news of two patents for FF zooms: 3 ...

I use the DA 16-85mm f/3.5-f/5.6 WR. I rarely use it wide open, (simply because that is typically not appropriate for my use), but I find is sharp when I stopped down a little. I've used it a lot ...

The scope of this review is my experience of using the D FA 28-105mm f/3.5-f/5.6 lens on a K-1 "in the field". I haven't done any "laboratory-style" tests, nor used this lens on any other camera. S ...

I should have said "all other things being equal". The D500 is a highly specialised top-tier APS-C camera. It is not what yardcoyote was request ing.

The K-1 takes the same battery as all Pentax flagship SLRs (including the K-5IIs) for many years. I don't know how much would be saved with a smaller battery. The main reason for the K-1 being ...