What digital projector features would be most useful for tracing
artwork onto a large canvas?

Do more lumens mean the projector needs less room darkness to project
the image clearly?

Is the ability to rotate the orientation a standard feature of digital
projectors?

Do standard projectors allow for aspect ratio adjustment?

Does the potential for image distortion vary much from brand to brand?


There are a lot of mid range home cinema type projectors on Amazon.

There are also some pricey "Artograph" models with "keystoning" and
grid features
But are they so much different than the less art specific brands?

TIA
--

Richard Treen

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On 18/07/2017 11:32, Richard Treen wrote:

What digital projector features would be most useful for tracing
artwork onto a large canvas?

Begin able to compensate to make a grid of straight lines straight and
orthogonal. Most lenses have some barrel or pincushion distortion
depending on where in their zoom range they are operating.

There is usually a golden optimum where most distortions cancel out
towards but not actually at the long focal length end.

Do more lumens mean the projector needs less room darkness to project
the image clearly?

Yes, but it probably doesn't matter if you aren't looking for use as a
movie projector. It is never going to work in bright sunlight and so
long as you can see the lines to trace it shouldn't matter.

Is the ability to rotate the orientation a standard feature of digital
projectors?

Some PC specific ones might but most are designed to work one way up.

Do standard projectors allow for aspect ratio adjustment?

I haven't seen one that wouldn't play anything from basic SD TV
resolution through 720p to 1080p and with the option to force aspect
ratio with crop or letterbox view. In fact we tricked a 1080p projector
with a DVD playing in HD 720p format into working at a much longer throw
so that it didn't interpolate pixels up damaging text quality.

Does the potential for image distortion vary much from brand to brand?

Enormously. In general the further from the screen the projector is the
closer to ideal paraxial rays the image projection becomes. Conversely
the closer to the screen you put it the more essential it is to have
everything dead square on centre line and a very well behaved lens.

There are a lot of mid range home cinema type projectors on Amazon.

There are also some pricey "Artograph" models with "keystoning" and
grid features
But are they so much different than the less art specific brands?

I reckon you need keystone correction on the vertical axis unless you
have a very tall projector stand. Keystone correction horizontally is
also available but I think is more of a feature than a benefit.

A PC can produce any test patterns you like or you could manually
superimpose a grid on the image you want to project.

--
Regards,
Martin Brown

On 18/07/2017 11:32, Richard Treen wrote:

What digital projector features would be most useful for tracing
artwork onto a large canvas?

Do more lumens mean the projector needs less room darkness to project
the image clearly?

Yup basically.

Is the ability to rotate the orientation a standard feature of digital
projectors?

Not usually - but you can level the projector, and most will offer some
level of "keystone" adjustment (basically correcting the parallelogram
distortion arising from off axis projection.

Do standard projectors allow for aspect ratio adjustment?

You may get some. They will normally also allow letterboxing for non
native ratios.

Does the potential for image distortion vary much from brand to brand?

The amount of keystone correction can vary - so some will allow you to
have larger look to the side or up/down offsets and still get you an
image with square corners.

There are a lot of mid range home cinema type projectors on Amazon.

Indeed.

There are also some pricey "Artograph" models with "keystoning" and
grid features

Some keystone correction should be a feature of most of them.

But are they so much different than the less art specific brands?

Never tried one of the "art" ones so can't really comment. I can see
that being able to have it off axis enough to get your shadow out of the
way could be very useful though.

--
Cheers,

John.

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On 18/07/2017 11:32, Richard Treen wrote:

What digital projector features would be most useful for tracing
artwork onto a large canvas?

Do more lumens mean the projector needs less room darkness to project
the image clearly?

Is the ability to rotate the orientation a standard feature of digital
projectors?

Do standard projectors allow for aspect ratio adjustment?

Does the potential for image distortion vary much from brand to brand?


There are a lot of mid range home cinema type projectors on Amazon.

There are also some pricey "Artograph" models with "keystoning" and
grid features
But are they so much different than the less art specific brands?

TIA


If you can afford one of the ultra short throw projectors that uses a
large mirror then they don't cast deep shadows when you put something in
front of them.

Thanks for all the advice. I'll see hoqw much of it can be applied to
models in my affordable price range.
--

Richard Treen

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On 18/07/2017 11:32 AM, Richard Treen wrote:

What digital projector features would be most useful for tracing
artwork onto a large canvas?

Do more lumens mean the projector needs less room darkness to project
the image clearly?

Is the ability to rotate the orientation a standard feature of digital
projectors?

Do standard projectors allow for aspect ratio adjustment?

Does the potential for image distortion vary much from brand to brand?


There are a lot of mid range home cinema type projectors on Amazon.

There are also some pricey "Artograph" models with "keystoning" and
grid features
But are they so much different than the less art specific brands?

TIA



Though it's very early tech at the moment, look into SprayPrinter.
This method, from phone to wall, is the future.

Ray.