Legend:
Grey squares - Selectabe crossed AF points
Hollow squares - Selectable linear AF points
Small circles - Non-selectable linear AF points
Btw, Mistral, where did you get this diagram? :-o It must belong to a product story later! ;-)
Update (Nov 9):
Mistral75 advised in his reply (via his latest comment below) that the above SAFOX 13 layout was a sensible guess based on the original official diagram showing cut-outs in the lines (as broken lines) of the finder marks and brackets, which was actually a collaborative work created among three members in the French CDI Forum.
To verify if this could be really true, I have made a new overlay diagram with their assumed SAFOX 13 with an official SAFOX 12 one. Note that with the new magnified APS-C viewfinder of the K-3 III, now the covered AF areas of the K-3 III and the K-1 are more or less the same, except the extreme peripherals:
My own wild guess Pentax has opted to keep the old SAFOX module and add/build new AF points based on the old AF module, since the number of crossed AF points remain unchanged, i.e. at 25 nos.
In this connection, I don't think the above brand new layout is completely an accurate guess. Instead, a 5x5 crossed AF points surrounded by another 6x6 linear AF points in alternative / interlaced manner would be more sensible. As for the remaining linear 40 points, they can be put/added at the two sides as well as at the top and the bottom, surrounding the central part of the AF point crowd, making up a total of the 101 points, which are all visible and selectable in groups.
Besides, just for the sake of seeing what the SAFOX 12 would look like if it is yet put into the K-3 III, the following overlay diagram is also made:
Logging you in...
Mistral75 · 228 weeks ago
RiceHigh 110p · 228 weeks ago
Mistral75 · 228 weeks ago
This SAFOX 13 diagram is based on information published by Ricoh Imaging:
- SAFOX 13 to include 101 focus points, of which 25 cross-type
- the diagram on this page https://pentaxofficial.com/en/7210/
The latter shows 13 breaks in the horizontal lines, of which two on the left part, nine in the centre and two on the right part. There are therefore 13 rows of focus points, of which two on the left, nine in the centre and two on the right.
Having nine rows in the central part, of which five include cross-type focus points and four are purely made of linear focus points, leads to 9x9 = 81 focus points in the centre with an alternance of cross-type and linear focus points.
This leaves 10 focus points, all linear, in two rows on each side to arrive at the total of 101 focus points.
The linear sensors in the central part have to be non-selectable assistance sensors because, since they are not cross-type, it would be suboptimal to select one of them instead of one of its cross-type neighbours.
As for the two brackets on each side, one can see slight traces of them on the published diagram when appropriately enlarging it and enhancing the picture's contrast.
Derek · 228 weeks ago
Also typical for Pentax: the viewfinder fields most likely will not represent the actual sizes nor shapes of the true AF "shapes", again. So let's assume something like:
- a field is sensitive for everything between its respective neighbors.
- the areas of true sensitivity will have awkward T or L shapes, at least all outer ones. That's my prediction.
Mistral75 · 227 weeks ago
However, it's a bit difficult to reconcile your alternative scheme 'a 5x5 crossed AF points surrounded by another 6x6 linear AF points in alternative / interlaced manner' with what we know from the diagram published by Ricoh Imaging: that the selectable AF points are arranged in 13 columns, two fairly spaced on the left third, nine in the centre and two on the right third.
The 6x6 linear AF points you're speaking of are either selectable or non-selectable.
If they were selectable, together with the 5x5 crossed AF points they would add up to 11 columns, leading to 20 AF points packed along a single column on the extreme left and the same on the extreme right, which would be... I'll let you chose the epithet. :)
If they were not selectable, that would mean that the 5x5 crossed AF points would be packed in the centre, at least horizontally, and flanked on each side by four columns totaling 20 AF points. Something like the following:
https://i29.servimg.com/u/f29/19/47/42/87/pentax1...
RiceHigh 110p · 227 weeks ago
Mistral75 · 227 weeks ago