[release] IJN periscope v 1.0

keltos01 · 02-25-09, 03:57 PM

RL I-400 periscope :

http://www.webenet.net/~ftoon/memory/japsub.html

ingame :

Finally we have an IJN scope for the IJN submarines

It took a bit of trial and error with the alpha channel, at one point I had no mask left but here it come !The picture seen here above was large enough as to have all the scopes' markings visible which in turn ensures a reliable and accurate scope ingame.

download link :

http://www.mediafire.com/file/jcz20i...eL_compass.rar

keltos

Hitman · 02-25-09, 04:05 PM

Are you sure that is a TRUE japanese submarine periscope??

Looks to me very similar to the US one

, might be coincidence of course, but still.....

Another question: What are the lines calibrated to? 1 degree?

keltos01 · 02-25-09, 04:28 PM

Quote:

Originally Posted by Hitman

Are you sure that is a TRUE japanese submarine periscope??

Looks to me very similar to the US one

, might be coincidence of course, but still.....

Another question: What are the lines calibrated to? 1 degree?

yes it should be, and yes the lines are 1 degree.

The japanese copied both the american and the germans optics for their scopes

http://www.fischer-tropsch.org/prima...ort%20X-05.pdf

http://www.fischer-tropsch.org/prima...t%20S-01-1.pdf

http://www.fischer-tropsch.org/prima...t%20S-01-6.pdf

keltos

keltos01 · 02-26-09, 08:40 AM

FLeet boat periscope :

notice the secondary vertical and horizontal lines forming across to the left and above the crosshairs.

http://www.fleetsubmarine.com/periscope.html

RL I-400 periscope :

http://www.webenet.net/~ftoon/memory/japsub.html

Here the secondary crosshair is not there
the vertical graduations do not match the horizontal line like on the US scope
there are 3 graduations under the horizontal line to be level with the vertical markers to the left, 4 on the US scope.

-> ergo different optics

Hitman · 02-26-09, 08:58 AM

The fact that the optics were copied from, or inspired by the US and german devices does not mean that the reticles would be copied exactly. In fact, I think that it refers much more to the glass and metallic parts, to the hard parts of the construction.

The shot you posted looks to me like a picture of a japanese submarine when viewed through a US periscope, probably after the rendition of Japan.

There are many pictures taken through periscopes of Fleet Boats, and none I have seen do have those additional vertical and horizontal lines of that drawing you posted above.

See this f.e. : http://en.wikipedia.org/wiki/File:Pe...ew-sinking.jpg

And this one from Wahoo's scope: http://upload.wikimedia.org/wikipedi...scope-view.jpg

Hitman · 02-26-09, 09:02 AM

Come to think of it, may be you would get a good reticle if you are able to see a picture of what current japanese submarines are using today. From what I have seen so far, US Los Angeles class submarines still have in their scopes the same reticle as during WW2, and more or less the same happens with the russian and british submarines.

And in any case, even if it is different from the WW2 counterpart, it still will be positively from a japanese sub

Look at this, this one is a german reticle from the contemporary U-33 (Type 206 class): http://1.bp.blogspot.com/_cys2T5FgJd...3%2Blaunch.jpg

And it looks almost identical to the WW2 reticle in the observation scopes (I have pictures of the manual of one of those scopes and can confirm that)

keltos01 · 02-27-09, 07:40 AM

Quote:

Originally Posted by keltos01

FLeet boat periscope :

notice the secondary vertical and horizontal lines forming across to the left and above the crosshairs.

http://www.fleetsubmarine.com/periscope.html

RL I-400 periscope :

http://www.webenet.net/~ftoon/memory/japsub.html

Here the secondary crosshair is not there
the vertical graduations do not match the horizontal line like on the US scope
there are 3 graduations under the horizontal line to be level with the vertical markers to the left, 4 on the US scope.
-> ergo different optics

Here's USS Bowfin's periscope : no horizontal line :

http://images.search.yahoo.com/image...sigh=118tg705g

Keltos

Hitman · 02-27-09, 08:33 AM

Very nice pic through periscope

I would say that it is clear by now that the picture you used is of a US periscope.

Wether japanese submarines used them or not, is the question, but I'm inclined to believe that there would be some differences.

Are the numbers in japanese normally written as in our language, or do they use special symbols?

02-25-09, 03:57 PM	#1
keltos01 Silent Hunter Join Date: Feb 2008 Location: Milan Italy Posts: 4,999 Downloads: 114 Uploads: 18	[release] IJN periscope v 1.0 RL I-400 periscope : http://www.webenet.net/~ftoon/memory/japsub.html ingame : Finally we have an IJN scope for the IJN submarines It took a bit of trial and error with the alpha channel, at one point I had no mask left but here it come !The picture seen here above was large enough as to have all the scopes' markings visible which in turn ensures a reliable and accurate scope ingame. download link : http://www.mediafire.com/file/jcz20i...eL_compass.rar keltos __________________ "Honorable Builder of Sinking Ships" Last edited by keltos01; 03-25-09 at 02:47 PM.

02-25-09, 04:05 PM	#2
Hitman Pacific Aces Dev Team Join Date: Sep 2002 Location: Spain Posts: 6,109 Downloads: 109 Uploads: 2	Are you sure that is a TRUE japanese submarine periscope?? Looks to me very similar to the US one , might be coincidence of course, but still..... Another question: What are the lines calibrated to? 1 degree? __________________ One day I will return to sea ...

02-26-09, 08:40 AM	#4
keltos01 Silent Hunter Join Date: Feb 2008 Location: Milan Italy Posts: 4,999 Downloads: 114 Uploads: 18	US vs IJN periscope view FLeet boat periscope : notice the secondary vertical and horizontal lines forming across to the left and above the crosshairs. http://www.fleetsubmarine.com/periscope.html RL I-400 periscope : http://www.webenet.net/~ftoon/memory/japsub.html Here the secondary crosshair is not there the vertical graduations do not match the horizontal line like on the US scope there are 3 graduations under the horizontal line to be level with the vertical markers to the left, 4 on the US scope. -> ergo different optics __________________ "Honorable Builder of Sinking Ships"

02-26-09, 08:58 AM	#5
Hitman Pacific Aces Dev Team Join Date: Sep 2002 Location: Spain Posts: 6,109 Downloads: 109 Uploads: 2	The fact that the optics were copied from, or inspired by the US and german devices does not mean that the reticles would be copied exactly. In fact, I think that it refers much more to the glass and metallic parts, to the hard parts of the construction. The shot you posted looks to me like a picture of a japanese submarine when viewed through a US periscope, probably after the rendition of Japan. There are many pictures taken through periscopes of Fleet Boats, and none I have seen do have those additional vertical and horizontal lines of that drawing you posted above. See this f.e. : http://en.wikipedia.org/wiki/File:Pe...ew-sinking.jpg And this one from Wahoo's scope: http://upload.wikimedia.org/wikipedi...scope-view.jpg __________________ One day I will return to sea ...

02-26-09, 09:02 AM	#6
Hitman Pacific Aces Dev Team Join Date: Sep 2002 Location: Spain Posts: 6,109 Downloads: 109 Uploads: 2	Come to think of it, may be you would get a good reticle if you are able to see a picture of what current japanese submarines are using today. From what I have seen so far, US Los Angeles class submarines still have in their scopes the same reticle as during WW2, and more or less the same happens with the russian and british submarines. And in any case, even if it is different from the WW2 counterpart, it still will be positively from a japanese sub Look at this, this one is a german reticle from the contemporary U-33 (Type 206 class): http://1.bp.blogspot.com/_cys2T5FgJd...3%2Blaunch.jpg And it looks almost identical to the WW2 reticle in the observation scopes (I have pictures of the manual of one of those scopes and can confirm that) __________________ One day I will return to sea ...

02-27-09, 08:33 AM	#8
Hitman Pacific Aces Dev Team Join Date: Sep 2002 Location: Spain Posts: 6,109 Downloads: 109 Uploads: 2	Very nice pic through periscope I would say that it is clear by now that the picture you used is of a US periscope. Wether japanese submarines used them or not, is the question, but I'm inclined to believe that there would be some differences. Are the numbers in japanese normally written as in our language, or do they use special symbols? __________________ One day I will return to sea ...