neato. are there other tools somewhere on the site (besides camera chooser) or coming soon?
Chesapeake & Midlantic
Seeing as height affects camera performance, would you consider adding it as a variable?
Chesapeake & Midlantic
Also, would you consider creating a mobile app? I'd pay a small but reasonable fee to get this on my phone.
Works better with more options than any of the ones I've used. Good job!
One question: Maybe I'm overlooking how to do it exactly, but let's say you have a problem like the seminal 'View a Face at 3000M'. One where there is no target horizontal FOV but only a ppf requirement ~50 (?) and a distance to target. And for greater applicability let's assume only 100ft , not 3000M, for distance to target. What's the best way to find out what your choices are among the multiple solutions in three unknowns (FL,SS,RES). Just start plugin' each one and stop when your out of range?
@Ari, not quite the same as a mobile app, but the calculator seems to work fine in safari on ios, so iphone will work, of course its kinda small. :(
We in the civilised world use the metric system. I only have 2 feet and I'm sure my collegues have different sized feet. Sounds like quite an inaccurate system of meassurring.
Oh, and praised be the gods. A calculator which has 1/2.7" CMOS size!
We have enhanced the calculator with improved daytime PPF previews and new night time / low light ones. Check it out - lower right hand corner of the calculator.
Could you add the capability to enter Distance to Object and Horizontal FoV and have it calculate Angle of View and Focal Length?That would be more useful for my purposes.
Also, will the calculator be something I can share with my team?
By the way, one calculator I would like to see is something that shows what you can see from certain angles and distances. For instance, if we want to see the faces of slot machine(s), I typically use my arm or a stick which I sight along to determine the correct mounting location for a camera.
Through trial and error, I've found that 45 degrees +/- ~10 degrees from the face of slots gives adequate coverage but it's tough to pass that trick along. Most people can't picture the results in their heads. A graphic would be ideal and I suppose I could take a bunch of pictures from various angles to show a comparison but....
A good part of the consideration includes obstruction of the face by objects and people: too high an angle and you lose the ability to see the display. Too low and the display can be blocked by the customer. Other considerations are focus variance. Too large a lens-to-object distance variation between machines and you can't get them all in focus simultaneously.
We have made a number of major improvements to the calculator:
- Directly edit PPF and HFoV as well as AoV, Distance to Object, resolution, etc. This provides great flexibility in trying out different combinations.
- The controls have been moved up top, which makes the calculator more compact and quicker to change settings.
- Added PPF preview for night time which shows the contrast between day and night image quality.
- Added convenience controls to adjust distance / PPF from inside the PPF preview so its easier to try different settings out.
We won't officially promote it until next week but you can try the improved calculator here.
Looking forward to more feedback.
Like the always on advanced what-if mode...
What's the best way to change the focal length and have it only recalculate the ppf leaving everything else alone? And vice versa?
I see that you have an upper limit on focal length in-place. I've heard there is some limitation with these linear calculators and long-lens lengths, but I've never learned the details. Is this why the 500mm cap exists, and if so can you explain what causes the problem?
Focal length appears to override everything in Advanced. For instance, when I enter distance as 15' and try to enter a horizontal field of view of 6', it keeps changing distance to 3' while keeping the lens 2mm.
Btw, one thing we have queued up is to click and drag the AoV / FoV lines on the graph to make it easier to try out different HFoVs.
Not sure if it's easy but, as you already have a database of tested cameras, i guess you could have one pick his camera to fill in the imager size, resolution and angle limits.
Or the other way around, after selecting the parameters you could get a list of cameras which fit in , by form-factor , and with links to your tests.
Just some ideas.
Very nice. Well thought out.
The calculator will be formally released on Monday.
We made 2 major changes to it this week that I think you will really like:
- You can now control AoV by dragging the AoV lines on the graph
- You can no control distance to target by dragging the camera icon on the graph up and down.
Now that we have these 2, I use them constantly to fine tune / experiment / refine calculations.