#87 Wrong Maker name for pentax model cameras

[André Gauthier]

hello

When trying to correct a "Pentax K-70" image with Lensfun in Rawtherapee, the camera is not automatically recognized.
It happens that in the DB, we have for this camera (and also for other Pentax models from Ricoh)
<maker>Pentax</maker>
while in exif metadata we have
Make RICOH IMAGING COMPANY, LTD.

Rawtherapee abbreviates the camera Make field as RICOH.

If I mofify the maker field in the DB as <maker>Ricoh Pentax</maker>, camera is automatically recognized.
Thus will it be possible to add to all pentax cameras models "Ricoh" in the maker field?

DB time stamp: 1506164944

[Torsten Bronger]

We cannot add it but we can modify it. I can do it for the K-70. Are other models affected, too?

[André Gauthier]

All pentax cameras are made by RICOH IMAGING COMPANY, LTD.

As Rawtherapee abbrevates the exif make field as Ricoh, I suggest for all pentax cameras to replace
<maker>Pentax</maker>
by
<maker>Ricoh Pentax</maker>

such as to keep backward compatibility

[Torsten Bronger]

But this would not match in automatic camera detection. Besides, Pentax cameras before 2011 have no affiliation with Ricoh. And, the maker field may contain the brand (Pentax) instead of the owning company (Ricoh) for some models.

[André Gauthier]

You are right, the situation is more complex than I thought.
I collected a lot of pentax cameras photos to compile a list(surely partial) of PENTAX cameras with maker.
Furthermore, I suspect that DNG conversion can change the maker (I have to further check that).
We can find :
PENTAX
PENTAX Corporation
PENTAX RICOH Imaging
RICOH IMAGING COMPANY, LTD.

Not verified: K2000, KP and KAF2
Missing in DB: 645D maker PENTAX

diff file for DB with timestamp=1508913180

diff --git a/data/db/slr-pentax.xml b/data/db/slr-pentax.xml
index be9524c..95f7c09 100644
--- a/data/db/slr-pentax.xml
+++ b/data/db/slr-pentax.xml
@@ -254,7 +254,7 @@
     </camera>

     <camera>

-        <maker>Pentax</maker>
+        <maker>Ricoh Imaging Company, Ltd.</maker>
         <model>Pentax K-3</model>
         <model lang="en">K-3</model>
         <mount>Pentax KAF2</mount>
@@ -311,7 +311,7 @@
     </camera>

     <camera>

-        <maker>Pentax</maker>
+        <maker>Ricoh Imaging Company, Ltd.</maker>
         <model>Pentax K-S2</model>
         <model lang="en">K-S2</model>
         <mount>Pentax KAF2</mount>
@@ -319,7 +319,7 @@
     </camera>

     <camera>

-        <maker>Pentax</maker>
+        <maker>Ricoh Imaging Company, Ltd.</maker>
         <model>Pentax K-S1</model>
         <model lang="en">K-S1</model>
         <mount>Pentax KAF2</mount>