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Forum: What Camera Should I Buy? Feb 9, 2018, 9:04 PM
Replies: 2
Views: 137
Posted By TCav
If you want it to bulge out more in the center,...

If you want it to bulge out more in the center, you need to get closer. The bulge is the perspective distortion that can occur with any lens short of a telephoto. The amount of the bulge is...
Forum: General Discussion Feb 8, 2018, 12:56 PM
Replies: 6
Views: 267
Posted By TCav
I'm a firm believer that the wheel needs to be...

I'm a firm believer that the wheel needs to be reinvented every so often, just to remind us where we came from. But not to try to do it better. Otherwise, you might end up with a camel instead of a...
Forum: General Discussion Feb 8, 2018, 8:43 AM
Replies: 6
Views: 267
Posted By TCav
True, but if you want to communicate effectively...

True, but if you want to communicate effectively with others in the field, you need to use an agreed upon lexicon. And, so far, the agreed upon lexicon includes Depth of Field.

If you're not...
Forum: What Camera Should I Buy? Feb 8, 2018, 8:38 AM
Replies: 1
Views: 135
Posted By TCav
Spam...

Spam (https://www.youtube.com/watch?v=anwy2MPT5RE).
Forum: What Camera Should I Buy? Feb 8, 2018, 8:37 AM
Replies: 1
Views: 121
Posted By TCav
Spam...

Spam (https://www.youtube.com/watch?v=anwy2MPT5RE).
Forum: General Discussion Feb 7, 2018, 6:05 PM
Replies: 6
Views: 267
Posted By TCav
I'm all for using "exposure time" instead of...

I'm all for using "exposure time" instead of "shutter speed", and "Depth of Focus" instead of "Depth of Field", but I won't switch until Wikipedia does.

As a former professional metrologist and a...
Forum: General Discussion Feb 6, 2018, 8:56 AM
Replies: 2
Views: 169
Posted By TCav
The Canon 18-55 has a minimum focus distance of...

The Canon 18-55 has a minimum focus distance of 10 inches, which is pretty good for what you want to do.

That's not 10 inches from the front of the lens; that's 10 inches from the image sensor or...
Forum: General Discussion Feb 1, 2018, 12:49 PM
Replies: 1
Views: 290
Posted By TCav
That must have been fun for her! How many...

That must have been fun for her!

How many takes did she get to slap that guy?
Forum: Sony Alpha dSLR / Konica Minolta dSLR, Sony SLT Jan 28, 2018, 4:31 PM
Replies: 15
Views: 829
Posted By TCav
In the US, KEH...

In the US, KEH (https://www.keh.com/shop/cameras/digital-cameras/dslr/sony--aps-c-dx.html) is a good source of used photo gear and they have a 180 day warranty.
Forum: Canon EOS dSLR Jan 26, 2018, 6:50 AM
Replies: 1
Views: 348
Posted By TCav
The procedure is a little different with the T1i...

The procedure is a little different with the T1i (500D). With the T2i, you half press the shutter button to AF when using either the eyelevel viewfinder or the 'Live View'. With the T1i, you half...
Forum: Sony Alpha dSLR / Konica Minolta dSLR, Sony SLT Jan 19, 2018, 5:03 PM
Replies: 15
Views: 829
Posted By TCav
I've never been a big fan of used dSLRs. There's...

I've never been a big fan of used dSLRs. There's way too many moving parts in there, and no way to tell how much use and abuse they've been subjected to. "Refurbished" is as far back as I,...
Forum: Sony Alpha dSLR / Konica Minolta dSLR, Sony SLT Jan 18, 2018, 10:39 AM
Replies: 15
Views: 829
Posted By TCav
Whether the lenses he has are 'Full Frame' or...

Whether the lenses he has are 'Full Frame' or not, he's been using them on the APS-C 6MP KM7D, so any of the current A-Mount APS-C bodies would be most appropriate.

As of right now, the 24MP A68...
Forum: General Discussion Jan 18, 2018, 10:02 AM
Replies: 29
Views: 454
Posted By TCav
Clearly, that's a durable image, it was caused by...

Clearly, that's a durable image, it was caused by electromagnetic radiation, and therefore, it's a photograph.

Since the image is durable, and presuming that the electromagnetic radiation was...
Forum: General Discussion Jan 18, 2018, 9:51 AM
Replies: 29
Views: 454
Posted By TCav
No. A lens is something that can focus light. A...

No. A lens is something that can focus light. A pinhole can focus light, and thus, is a lens. If you increase the size of the pinhole, it lets in more light but the focus blurs.
Forum: General Discussion Jan 18, 2018, 9:45 AM
Replies: 1
Views: 139
Posted By TCav
https://www.youtube.com/watch?v=anwy2MPT5RE

https://www.youtube.com/watch?v=anwy2MPT5RE
Forum: Sony Alpha dSLR / Konica Minolta dSLR, Sony SLT Jan 17, 2018, 7:10 PM
Replies: 15
Views: 829
Posted By TCav
The APS-C size adapters, LA-EA1 and LA-EA2, have...

The APS-C size adapters, LA-EA1 and LA-EA2, have been discontinued, and the 'Full Frame' LA-EA3 is being phased out in favor of the 'Full Frame' LA-EA4, which has the 'Translucent' mirror system for...
Forum: General Discussion Jan 17, 2018, 7:04 PM
Replies: 29
Views: 454
Posted By TCav
Titanium dioxide nanoparticles are transparent,...

Titanium dioxide nanoparticles are transparent, in which case, they can be used to make lenses.
Forum: General Discussion Jan 17, 2018, 1:35 PM
Replies: 29
Views: 454
Posted By TCav
From the Wikipedia article Transparency and...

From the Wikipedia article Transparency and translucency (https://en.wikipedia.org/wiki/Transparency_and_translucency):

"In other words, a translucent medium allows the transport of light while a...
Forum: General Discussion Jan 16, 2018, 9:04 PM
Replies: 29
Views: 454
Posted By TCav
"An accomplished photographer was invited to a...

"An accomplished photographer was invited to a dinner party. The hostess praised the photographer's work and commented that he must have a really good camera. Later, when dinner was finished, the...
Forum: General Discussion Jan 16, 2018, 6:16 PM
Replies: 29
Views: 454
Posted By TCav
I believe the original quote is meant to suggest...

I believe the original quote is meant to suggest that photography is about the eye and what the brain perceives from what it sees.

But Photography is about RECORDING what we see and perceive, and...
Forum: General Discussion Jan 16, 2018, 6:31 AM
Replies: 29
Views: 454
Posted By TCav
From Wikipedia's article on Photography...

From Wikipedia's article on Photography (https://en.wikipedia.org/wiki/Photography):

"Photography is the science, art, application and practice of creating durable images by recording light or...
Forum: General Discussion Jan 16, 2018, 6:23 AM
Replies: 29
Views: 454
Posted By TCav
A pinhole is, in effect, a lens, just as...

A pinhole is, in effect, a lens, just as Einstein's General Theory of Relativity predicted that gravity can be a lens.
Forum: General Discussion Jan 15, 2018, 8:40 PM
Replies: 29
Views: 454
Posted By TCav
It's about the lens.

It's about the lens.
Forum: Sony Alpha dSLR / Konica Minolta dSLR, Sony SLT Jan 4, 2018, 8:00 PM
Replies: 15
Views: 829
Posted By TCav
Do you have many A-Mount lenses?

Do you have many A-Mount lenses?
Forum: Sony Alpha dSLR / Konica Minolta dSLR, Sony SLT Jan 4, 2018, 2:45 PM
Replies: 15
Views: 829
Posted By TCav
Sounds like a job for PRECISION CAMERA...

Sounds like a job for PRECISION CAMERA (http://www.precisioncamera.com/)!

Konica Minolta had an extended warranty for this kind of problem with their 7D and 5D, and in 2006 when Sony bought...
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