File :-(, x, )
would this be a good idea? Anonymous
picture is as holosight for a gun

but the idea is, a laser projector or something like that, bolted on the hotshoe

good for landscape photography because you would input your focal length and it would project the hyperfocal distance forward into your scene to show you where to focus

it calculates the stuff according to the data your camera feeds it and then you simply focus and have a perfectly focused shot every time to get everything you want in focus

could also project a straight horizontal beam the rest of the time to have a perfectly level shot i guess
>> Anonymous
Sooo...a rangefinder, basically?
>> Anonymous
i like it
>> Anonymous
>>223395

hmm, not quite sure but rangefinder makes it easy to gauge focus right

this is to figure out hyperfocal distance on anything you can strap it on, and it projects onto the scene for you
>> Anonymous
>>223403
Good luck seeing a laser during daylight hours.
>> Anonymous
>>223405

hmm, how do you think holosights work?

there are lasers that cut through granite

plenty of $10 lasers you can get on ebay are visible outside, it doesn't have to be a beam, you only need the sight point
>> ?????????????
I know how holosights like the Eotech pictured work but I have no idea wtf your talking about in your description.

Plus landscapes are easy to focus because 9 times out of 10 it's infinity with a small f/
>> Anonymous
why would you destroy a perfectly good $500 Eotech just to have a pseudo-rangefinder that you don't really need in the first place?
>> Depressed Cheesecake !wFh1Fw9wBU
     File :-(, x)
>> Anonymous
     File :-(, x)
>>223437
>> Anonymous
>>223437
BOOM HEADSHOT!
>> Anonymous
>>223391
This is quite possibly the stupidest photography-related idea I've ever heard. You can just use the distance scale on your lens to focus at the hyperfocal distance. If your lens lacks focusing scales, it is probably cheap and crappy. Given the price of holographic sights, it's reasonable to assume that they would be equally if not more expensive for cameras. Thus is would be both cheaper and better for your pictures to simply purchase a better lens that has a focusing scale than to buy a holographic sight that wouldn't do anything anyway.

Which brings me to my next point. Do you have the slightest idea what a holographic sight is? It doesn't project a laser anywhere or calculate the distance to anything. It simply an optical sight that is designed so that the cross hairs (or in this case, red dot) moves in response to your eye point and line of sight, so you can shoot accurately without your eye being precisely lined up as with iron sights or a precise distance away as with a traditional scope.
>> Anonymous
>>223478
Not the OP, but I have a related question:

Hyperfocal is marked on the focus ring as the beginning of the bar with the infinity symbol under it, or something similar, yes?
>> Anonymous
>>223490
No. Hyperfocal distance is not expressly marked on the lens because it is dependent on aperture. If your lens has depth of field markings, you can determine hyperfocal distance by turning the lens until infinity lines up with the DOF mark for the current f-stop on the right, the lens is now focused at the hyperfocal distance for that aperture.

Since most modern lenses lack depth of field scales, you have to calculate it or read it from a table then focus to that distance.
>> Anonymous
>>223499
Now I see what I was not seeing. Thank you.
>> Anonymous
>>223499you can determine hyperfocal distance by turning the lens until infinity lines up with the DOF mark

What the FLYING fuck?

Infinity does not equal hyperfocal distance.
>> Anonymous
>>223502
No, but if you actually read what I said rather than just screaming about how wrong I am you will see that I did not say it does.

If you line up the infinity mark with the RIGHT DEPTH OF FIELD MARK FOR THAT APERTURE, not the central focus mark, then the lens will be focused at the hyperfocal distance. Don't believe me? Google it. Or better yet, think about it.
>> Anonymous
     File :-(, x)
Ok do I have this setup right?

Camera-Specific Properties:Equipment MakeFUJIFILMCamera ModelFinePix S5700 S700Camera SoftwareDigital Camera FinePix S5700 S700 Ver1.02Maximum Lens Aperturef/3.5Sensing MethodOne-Chip Color AreaMaker Note Version0130Image-Specific Properties:Image OrientationTop, Left-HandHorizontal Resolution72 dpiVertical Resolution72 dpiImage Created2008:07:14 17:25:13Exposure Time1/13 secF-Numberf/3.5Exposure ProgramAperture PriorityISO Speed Rating1600Lens Aperturef/3.5Brightness-1.7 EVExposure Bias0 EVMetering ModePatternLight SourceUnknownFlashNo Flash, CompulsoryFocal Length6.30 mmColor Space InformationsRGBImage Width1600Image Height1200RenderingCustomExposure ModeAutoWhite BalanceAutoScene Capture TypeStandardSharpnessNormalSubject Distance RangeUnknownSharpnessNormalWhite BalanceAutoChroma SaturationNormalFlash ModeOffMacro ModeOnFocus ModeAutoSlow Synchro ModeOffPicture ModeAperture Prior AEContinuous/Bracketing ModeOffBlur StatusBlur WarningFocus StatusOKAuto Exposure StatusOK
>> Anonymous
>>223504

Ugh, that's NOT how it works and you're spreading false information.

Thanks for trolling.
>> Anonymous
>>223514
Then prove me wrong dumbass. Lets hear you explain it.
>> Anonymous
     File :-(, x)
>>223510
I didn't notice what f-stop you had set at first. You're not quite right there. On that lens the colored lines correspond to different f-stops, so right now it's focused at the hyperfocal distance for f/16. That lens doesn't have a DOF mark for f/8, so you would have to estimate it (it would probably be somewhere around the red IR focusing dot).

I forgot everything on Nikon lenses turn the opposite or normal. On every other manufacturer (as far as I know) it would be the marks on the right side.

Pic is DOF markings on a Leitz Summicron 35mm. It is currently focused at the hyperfocal distance.
>> Anonymous
>>223520
Jesus, I need to read these things before I post. You're at the hyperfocal distance for f/22, not f/16.
>> Anonymous
     File :-(, x)
>>223521
Ok I think I figured it out on my Praktica. Hyperfocal for 8 right?

Camera-Specific Properties:Equipment MakeFUJIFILMCamera ModelFinePix S5700 S700Camera SoftwareDigital Camera FinePix S5700 S700 Ver1.02Maximum Lens Aperturef/3.5Sensing MethodOne-Chip Color AreaMaker Note Version0130Image-Specific Properties:Image OrientationTop, Left-HandHorizontal Resolution72 dpiVertical Resolution72 dpiImage Created2008:07:14 18:00:26Exposure Time4 secF-Numberf/3.5Exposure ProgramAperture PriorityISO Speed Rating64Lens Aperturef/3.5Brightness-2.6 EVExposure Bias0 EVMetering ModePatternLight SourceUnknownFlashNo Flash, CompulsoryFocal Length15.10 mmColor Space InformationsRGBImage Width1600Image Height1200RenderingCustomExposure ModeAutoWhite BalanceAutoScene Capture TypeStandardSharpnessNormalSubject Distance RangeUnknownSharpnessNormalWhite BalanceAutoChroma SaturationNormalFlash ModeOffMacro ModeOnFocus ModeAutoSlow Synchro ModeOffPicture ModeAperture Prior AEContinuous/Bracketing ModeOffBlur StatusBlur WarningFocus StatusOKAuto Exposure StatusOver Exposed
>> Anonymous
>>223540
Yep, that's correct.

I assume you know how to read the DOF marks, but in case you don't this is telling you that right now everything from 10ft to infinity is in focus.
>> Anonymous
Is there a good way to figure this stuff out on a lens without all of those markings?
>> Anonymous
>>223587
Unfortunately, no.

There are companies that sell charts and calculators that you can carry with you, or you can make your own easily enough.

It's bullshit that companies don't bother with details anymore.
>> Anonymous
>>223584
Wow no I didn't know that. That's a brilliant system! Kudos to Lens Engineers of yesteryear.