How to Reverse FOV Slider?

Dafar · September 28, 2018 at 8:25 PM

I LOVE YOU!!!!

hahaah!!

It's PERFECT now!!!

Thank you sooooooo much!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

San7 · September 28, 2018 at 9:35 PM

not quite sure, it seems to be the angle diagonally across the matrix.
I would still do a button for the crop factor
type FF, crop 1.6, crop 1.3 and so on.

In fact, the code is much smaller:

Code

<!-- fov_to_focallength(Crop factor); For a full frame - 1 -->	
<events name="showfocal" keep="true" onviewchanged="fov_to_focallength(1);" />	
	
<layer name="pos_info2" keep="true" alpha="1" align="bottom" x="300" y="350" width="100"  url="%SWFPATH%/plugins/textfield.swf" enabled="false" 
       padding="8" background="true" backgroundcolor="0x2D3E50" backgroundalpha="0.7" css="font-family:Courier; color:#FFFFFF; font-size:12px;"  />
			
<action name="fov_to_focallength" >
	Math.tan(field,calc(view.fov / 114.6));
	calc(focal,21.622 / (field * %1));
	copy(print_fov, view.fov);
	roundval(focal, 1);
	roundval(print_fov, 1);
	calc(layer[pos_info2].html,'F = ' + focal + ' mm[br] FOV=' + print_fov + '°');
</action>

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Dafar · September 28, 2018 at 10:23 PM

I'm not using the crop factor setting that you created.
I'm using it manually because I need other important changes, not only to show a different focal length number.

But what I tried now is that the crop factor is inverted.
When I put 1.5 on the crop factor, the focal length get smaller, not bigger.
And, of course, it doesn't translate to view.fov. It's only a number changing.

For me, the way you made it is perfectly fine!
Thank you so much!!!

San7 · September 29, 2018 at 5:18 AM

As I understand it, the croep factor shows correctly

Dafar · September 29, 2018 at 2:15 PM

Actually no.

The crop factor will multiply the focal length value.

If you have 100mm in Full Frame, the 1.5x crop factor will give you 150mm.

San7 · September 29, 2018 at 2:51 PM

On a full frame of 50 mm you will get the same angle as on the crope of 33.4 mm
On the crope of 50 mm - the viewing angle will be less than 50 mm on the full frame.

Dafar · September 29, 2018 at 3:18 PM

Ahhh!!

Now I understood what you're doing.

You want only to show what focal length would be in the cropped sensor.

I thought you wanted to create the possibility to change the view to the cropped sensor, on the same focal length.

So... You're right. We both are! hahaha

Participate now!