Ugly Hedgehog - Photography Forum
Sensor size question
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Jan 13, 2021 12:46:21   #
Abo Loc: Victoria Australia
 
WJShaheen wrote:
Great illustration. Says it all.


Thanks.

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Jan 13, 2021 12:47:13   #
User ID
 
Abo wrote:

User ID is a great source of information ..........

So at last he sees the light !!!

Common sense does occasionally prevail. Good final call. Very helpful illustration as well. No algebra, just clear imagery. The simple way forward.

Odd thing is that essentially the same illustration exists all over the web, all versions equally clear and helpful, yet unhelpful multi page page uhh threads cluttered with math persist and recur as reliably as the tides :-(

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Jan 13, 2021 13:03:41   #
JohnR Loc: Hobart, Tasmania, Australia
 
John7199 wrote:
OK Beating a dead horse, but I'm an old codger.

Proud owner of a Nikon D5600, which I just heard Nikon is discontinuing.
When buying lens I know the certain lens will not operate at the stated focal length as others. Because of sensor size a 150mm will operate as a ??mm.

Please explain in non technical parlance. Also is there a formula to use?

This time I'll keep the answer. Thanks John


Hi John. My advice is forget all this BS about crop factors, fields of view etc etc. You have a great camera - go out and take photographs, PP them as necessary then use them as you need. Knowing about the technical aspects of lenses and cameras doesn't help your photography one bit.

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Jan 13, 2021 13:16:56   #
Abo Loc: Victoria Australia
 
User ID wrote:
So at last he sees the light !!!

Common sense does occasionally prevail. Good final call. Very helpful illustration as well. No algebra, just clear imagery. The simple way forward.

Odd thing is that essentially the same illustration exists all over the web, all versions equally clear and helpful, yet unhelpful multi page page uhh threads cluttered with math persist and recur as regularly as the tides :-(


You are your own worst enemy... User.

Again dear reader (see below) User ID has falsified a quote... confirming and proving
my previous post (which Bleirer tells me he reported to admin )
That gross misquote, being utterly out of context , represents the exact opposite of what I said.

I said it before in this thread and I'm saying this patent truth again:

User ID is a great source of information, but John you must know
how to interpret his posts.

Fortunately that's very simple, all you have to do to interpret
what he writes, is know the exact opposite
of what he says is true... In a nut shell, he's less than a talentless
hack with the IQ of a fence post.


(Download)

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Jan 13, 2021 13:42:05   #
User ID
 
Abo wrote:
You are your own worst enemy... User.

Again dear reader (see below) User ID has falsified a quote... confirming and proving
my previous post (which Bleirer tells me he reported to admin )
That gross misquote, being utterly out of context , represents the exact opposite of what I said.

I said it before in this thread and I'm saying this patent truth again:

User ID is a great source of information, but John you must know
how to interpret his posts.

Fortunately that's very simple, all you have to do to interpret
what he writes, is know the exact opposite
of what he says is true... In a nut shell, he's less than a talentless
hack with the IQ of a fence post.
You are your own worst enemy... User. br br Again... (show quote)


Uh oh, the hook has torn your lip ... all bloody and swollen. Do try to pull free before you swallow it, line, leader, and sinker ! Blood attracts the Great White. My condolences on that sorry occasion that looms seemingly inevitably. Your Infotainment Quotient really had been equal to the very best. But now you’re down to recycling worn out material. That is really sad, but it happens :-(

I spoze feeding a Great White is a bit more dignified than flopping about the bottom of a small boat, or just being chopped up for bait. Eris quod eris.

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Jan 13, 2021 14:39:07   #
Toment Loc: IL-FL
 
John7199 wrote:
OK Beating a dead horse, but I'm an old codger.

Proud owner of a Nikon D5600, which I just heard Nikon is discontinuing.
When buying lens I know the certain lens will not operate at the stated focal length as others. Because of sensor size a 150mm will operate as a ??mm.

Please explain in non technical parlance. Also is there a formula to use?

This time I'll keep the answer. Thanks John


Here’s a good article: https://newatlas.com/camera-sensor-size-guide/26684/#gallery:13

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Jan 13, 2021 14:51:35   #
User ID
 
Abo wrote:

I said it before in this thread and I'm saying this patent truth again:
User ID is a great source of information, .......................

How true .... that you’ve said it before.

Coupla more and it’s almost immortal.

You complained, repeatedly, that some context is missing. I didn’t find that part cogent or accurate, or even civil. It was clearly just a rant, so yes it’s edited. No loss of factual content occurred. That is what proper editing is all about.

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Jan 13, 2021 15:02:01   #
bleirer
 
Abo wrote:
Dear Bleirer,

thank you for reporting your report.

However, would you be civil to a very ignorant
and stupid individual like User ID, who has presented
something you have not said, as a "quote"
of yours?

Also, it may serve you well to
consider your (USA) "First amendment"
before you tattletale.

Regards,

Alan


This is my first double report. Why not make your case in a civil way without calling names? Why not use facts and persuasion and clear explanations to rebut something you disagree with?

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Jan 13, 2021 16:16:56   #
WJShaheen Loc: Gold Canyon, AZ
 
bleirer wrote:
This is my first double report. Why not make your case in a civil way without calling names? Why not use facts and persuasion and clear explanations to rebut something you disagree with?



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Jan 13, 2021 19:53:56   #
amfoto1 Loc: San Jose, Calif. USA
 
John7199 wrote:
...Proud owner of a Nikon D5600....
Because of sensor size a 150mm will operate as a ??mm.... Also is there a formula to use?
...


Yes, there's a formula.

Here's a little secret.... It really doesn't matter.

All that matters is how any given focal length works on YOUR camera. Who cares about how it would work on anyone else's?

All you really need to know is what's compatible. In your case, it's both DX and FX lenses in Nikon F-mount... which is literally many millions.

You simply need to know what focal lengths are wide, standard, telephoto on YOUR camera.

- 4mm to 8mm are fisheye, extremely wide, but uncorrected so that straight lines will tend to be strongly curved.
- 10mm to 15mm are ultrawide, more optically corrected than fisheye, but still some distortion, exaggeration.
- 16mm to 21mm wide angle
- 22mm to 38mm standard
- 40mm to 90mm short telephoto
- 100mm to 200mm moderate telephoto
- 250mm and up, powerful telephoto

It doesn't matter if the lenses are DX "crop sensor" or FX "full frame" designs. Focal length is focal length, regardless of the format it used upon. Changing formats does affect how any given focal length "behaves". But unless you are planning to switch formats and want to replicate the angle of view of your lenses on your old format, it really doesn't matter.

If you still want the formula, it's the "lens factor" comparing a DX camera like your D5600 to a full frame/FX such as the Nikon D750, you either multiply or divide by 1.5X.

To understand what lens you'd need to buy for an FX camera, if you wanted one that will "act like" a 21mmm did on your DX camera, 21 times 1.5 = 31.5.... and the closest typical lenses are either a 28mm (slight wider) or a 35mm (slightly less wide).

Conversely, if you were looking for a lens to use on your DX camera that would "act like" an 85mm lens someone else is using on their FX camera, 85 divided by 1.5 = 56.66... and there are 55mm and 56mm lenses available that would give the results you want.
-
But if you are just looking at lenses to use on your current camera or another camera with the same sensor format, it really doesn't matter.

| Reply
Jan 13, 2021 19:57:48   #
edmixon Loc: Orange County CA
 
Wow!! You guys sure lost me!!
Wish we could put it in terms a dummy like me could easily grasp.
(I’ve been considering replacing my Canon 7D) due to how Okd it and I have become.

Any thoughts would be appreciated.
😀

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Jan 13, 2021 19:58:52   #
edmixon Loc: Orange County CA
 
Make that how “old” it and I have become!

| Reply
Jan 13, 2021 20:08:58   #
CHG_CANON Loc: the Windy City
 
edmixon wrote:
Make that how “old” it and I have become!


The Canon EOS crop factor is 1.6 vs 1.5 for Nikon and Sony. In the discussion above, the 100mm full-frame lens will have an equivalent field of view of 160mm when mounted to an EOS cropped DSLR body.

What is 'wrong' about your EOS 7D? You paid a premium for this all-weather professional camera with an expected shutter life of a minimum of 150,000 actuations. If you shot 10,000 images per year every year, that's an expected life of 15-years. When you think the camera is old, in what way to you mean? How does it show that it's old other than years?

What do you want to accomplish with a 'new' camera? What lenses do you have today? What is your budget? Old is not a reason alone to replace a camera, not a Nikon D5300 nor an EOS 7D.

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Jan 13, 2021 20:15:38   #
edmixon Loc: Orange County CA
 
Thank you. I just have been bombarded about full-frame & mirrorless gear.

I have shot maybe 1000 pics with it and I have about 6-7 lenses for it.

I also have my other 35mm film camera as well.

Just reaching a point where I’m missing something about going forward.

Again, thank you. It is appreciated.

| Reply
Jan 13, 2021 20:26:02   #
User ID
 
edmixon wrote:
Wow!! You guys sure lost me!!
Wish we could put it in terms a dummy like me could easily grasp.
(I’ve been considering replacing my Canon 7D) due to how Okd it and I have become.

Any thoughts would be appreciated.
😀


Buy another canon of approximately the same price and you will have replaced the old with the new with a minimum of change or readjustment.

Hopefully that approach is in terms anyone can grasp without any gratuitous technobabble.

Likewise if you feel the user has gotten too old and needs a lighter camera, choose any Lumix m4/3 body above “entry level”. Expect to pay several hundred $$ body only or about $1k with a kit lens.

:::::::::::::::::::::::::::::::;;;;;;;

Add a second lens if needed. A second lens is often not needed with m4/3 becuz the reduced format permits quality “kit” lenses with more zoom ratio than the other (larger) formats.

The marked FLs on m4/3 lenses will be a bit smaller than on your canon. Thaz normal. Don’t ask about it. It’s normal. If you ask for details you’ll regret it !!!

M4/3 kit zooms start at 12 or 14mm (mid wide) and go to 60, 140, and 200mm, which are “basketball”, “football/soccer”, and “wildlife” in respective order.

Thaz all you need to know. More is just the usual technobabble snow jobs :-(

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