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Marc Sabatella · 01-14-2009, 04:13 PM

Originally posted by ryan s

I've been thinking of making a guide for manual lens usage.

I would need help with shots of the menu screens of other cameras like the ist and K100D, for example. Oh and also finding the correct pages(s) in the respective manuals.

That way, someone can just paste the wiki/sticky link in a thread, and a mod can close the thread once they acknowledge their problem is solved.

See:

K100D (Super) Pictorial guide to using manual lenses [imgs]: Pentax SLR Talk Forum: Digital Photography Review

jsherman999 · 01-14-2009, 06:38 PM

.

Q: Zoom vs. Prime?

A: #@$&*^%)&* and your momma #@!)&^%$

...

Q: What is meant by crop factor, and is my 35mm lens really a 50mm lens?

A: #$*(%^$%#!)&%you stupid #!(&%^$@ twice!

.

magnum1 · 01-14-2009, 07:30 PM

Keep in mind, any time you have between 300 and 800 people on one site, you will always have repeat questions. People by nature will do the quick thing and ask rather than search. I am one of them.

Get used to it. I ain't going away.

Mike Cash · 01-15-2009, 04:43 AM

Originally posted by magnum1

Keep in mind, any time you have between 300 and 800 people on one site, you will always have repeat questions. People by nature will do the quick thing and ask rather than search. I am one of them.

Get used to it. I ain't going away.

I don't think any of us are silly enough to think it will go away. But a decrease of some degree can be expected. We notice the people who ask, but the people who do a search and find the information they need go unnoticed.

At the very least we can have something to point them toward and save ourselves endless retyping of the exact same information over and over.

Finn · 01-15-2009, 05:32 AM

I second "Zooms or primes?"

"I just got a new DSLR. What lenses should I buy?"

"Should I switch [from/to] [Canon/Nikon]?"

"Pentax sux. My pics are always blurry." ...said by the guy trying to take available light shots at night with the kit lens.

Urmas R. · 01-15-2009, 03:35 PM

Q: Is it worthwhile to invest into Pentax gear? Isn't Pentax going out of business?
A: Buy all the zooms you want, but please don't bid on Ltd primes on ebay. Not worth it

jmc7104 · 01-15-2009, 05:30 PM

Or the statement, "I'm going over to Cannon just after I get done raising all the hell I can dump on Pentax" or to that effect.
jim

**Douglas_of_Sweden** · 01-15-2009, 05:46 PM

Originally posted by Lowell Goudge

you can add to that

will this flash work - and how to measure trigger voltage

I just got a K mount lens and the shutter wont trip.

.......

Just try it on the camera. If the camera starts to smoke the voltage was too high

Or: it's easy, put your tounge on the flash contacts and test-fire the flash. If you can still feel your tounge afterwards the voltage is probably safe

Sorry, was this a serious thread?

**Douglas_of_Sweden** · 01-15-2009, 05:52 PM

Originally posted by jmc7104

Or the statement, "I'm going over to Cannon just after I get done raising all the hell I can dump on Pentax" or to that effect.
jim

I've noticed that if I write the f-word it is sensored into "****" .

What about asking Adam if he can adapt that function on some other words so that next time we only have to read: "I'm going over to ****** just after I get done..."

I guess that should effectively get rid of all posts on how much better *****, ****** or **** are.

KungPOW · 01-15-2009, 06:48 PM

For someone new to photography, and new to a DSLR, and new to Pentax, finding information on your own can be very difficult.

Without SOME background knowledge, how do you search for a solution to the problem you have?

Someone who does not know what an aperture ring is, has very little chance of finding out how to use an SMC-M 50/f2 on their brand new K100D. They may not even know what the question is that they need to ask. For all they know, the lens will not work.

So we will see the same question over and over. I'm sure the poster knows they are not the first to ask the question, but maybe they are not that savey with the search function, or the results of the search do not look apropriate to the newbie.

A newbie that has that M lens, might not realise a post "How to use a lens without an A setting on the aperture ring" is the post they need to read.

I think a common questions thread is a great idea. I also think it should be part of the Pentax Knowledge catagory. And new members should get a link in their e-mail.

As for the whole "crop factor" thing...

I think we all agree that it is a poor name for the effect of a 135 format lens on an aps-c sensor. But, it is the common wording used. Here is my contribution:

Crop factor or sensor size field of view effects:

1. Only the field of view is changed, and it is reduced. A comparable field of view is calculated by multiplying the "crop factor" by the lens focal length. For aps-c this id 1.5

2. A reduced field of view changes the 1/focal length rule for shutter speed. The reduced field of view, increases the impact of camera shake, and thus the new rule is 1/focal lenght*crop factor

3. Depth of field for a given f-stop is unchanged. But because your field of view is reduced, you will use the lens at a greater distance from the subject to get similar framing, and the resulting depth of field is greater because of camera to subject distance.

4. Perspective is a function of distance to subject, and is not a funtion of focal length. Closer to the subject gives an expanded perspective, further from the subject gives a compressed perspective. Because the field of view is reduced, a given lens on aps-c will be used further from the subject then the same lens on 135 format.

I'm sure I've repeated something previously posted, or I have something wrong, or missed. I expect this will be pointed out.

Wheatfield, good luck on your project.

Blue · 01-16-2009, 01:42 PM

Here's another one for you, PEF or DNG

https://www.pentaxforums.com/forums/general-pentax-photography/47086-pef-dng.html#post453843

**Rense** · 01-17-2009, 03:16 AM

Originally posted by Blue

Here's another one for you, PEF or DNG

https://www.pentaxforums.com/forums/general-pentax-photography/47086-pef-dng.html#post453843

Yea, or just "RAW or JPEG"?

dazman · 01-17-2009, 04:42 AM

Filters...should I use them?...Which brand?...Should I get this expensive one or this cheaper one?...and so on and so forth.

**Douglas_of_Sweden** · 01-17-2009, 07:23 PM

Maybe we could make a FAQ file here at the forum?
I accidentally found such a file a while ago for Olympus that was really impressive.
Perhaps it already exist for Pentax?

Fl_Gulfer · 01-17-2009, 09:03 PM

Originally posted by Douglas_of_Sweden

Maybe we could make a FAQ file here at the forum?
I accidentally found such a file a while ago for Olympus that was really impressive.
Perhaps it already exist for Pentax?

I agree,, most sites have a FAQ section.

Why do they say a lens isn't the same MM as listed on the lens when it's on a Digital Camera?

01-16-2009, 01:42 PM	#26
Blue Moderator Site Supporter Join Date: Jun 2008 Location: Florida Hill Country Photos: Gallery \| Albums Posts: 17,377	PEF or DNG Here's another one for you, PEF or DNG https://www.pentaxforums.com/forums/general-pentax-photography/47086-pef-dng.html#post453843

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01-14-2009, 04:13 PM	#16
Marc Sabatella Veteran Member Join Date: Sep 2006 Location: Denver, CO Photos: Gallery Posts: 10,685	Originally posted by ryan s I've been thinking of making a guide for manual lens usage. I would need help with shots of the menu screens of other cameras like the ist and K100D, for example. Oh and also finding the correct pages(s) in the respective manuals. That way, someone can just paste the wiki/sticky link in a thread, and a mod can close the thread once they acknowledge their problem is solved. See: K100D (Super) Pictorial guide to using manual lenses [imgs]: Pentax SLR Talk Forum: Digital Photography Review

01-14-2009, 06:38 PM	#17
jsherman999 Veteran Member Join Date: Dec 2007 Photos: Gallery Posts: 8,237	. Q: Zoom vs. Prime? A: #@$&^%)& and your momma #@!)&^%$ ... Q: What is meant by crop factor, and is my 35mm lens really a 50mm lens? A: #$*(%^$%#!)&%you stupid #!(&%^$@ twice! .

01-14-2009, 07:30 PM	#18
magnum1 Inactive Account Join Date: Oct 2007 Location: Niagara, Wisconsin U.S. of Ay. Posts: 394	Keep in mind, any time you have between 300 and 800 people on one site, you will always have repeat questions. People by nature will do the quick thing and ask rather than search. I am one of them. Get used to it. I ain't going away.

01-15-2009, 04:43 AM	#19
Mike Cash Veteran Member Join Date: Jan 2007 Location: Japan Photos: Gallery Posts: 6,950	Originally posted by magnum1 Keep in mind, any time you have between 300 and 800 people on one site, you will always have repeat questions. People by nature will do the quick thing and ask rather than search. I am one of them. Get used to it. I ain't going away. I don't think any of us are silly enough to think it will go away. But a decrease of some degree can be expected. We notice the people who ask, but the people who do a search and find the information they need go unnoticed. At the very least we can have something to point them toward and save ourselves endless retyping of the exact same information over and over.

01-15-2009, 05:32 AM	#20
Finn Veteran Member Join Date: Feb 2007 Location: Phoenix Photos: Gallery Posts: 1,056	I second "Zooms or primes?" "I just got a new DSLR. What lenses should I buy?" "Should I switch [from/to] [Canon/Nikon]?" "Pentax sux. My pics are always blurry." ...said by the guy trying to take available light shots at night with the kit lens.

01-15-2009, 03:35 PM	#21
Urmas R. Senior Member Join Date: Oct 2008 Location: Germany Posts: 179	Q: Is it worthwhile to invest into Pentax gear? Isn't Pentax going out of business? A: Buy all the zooms you want, but please don't bid on Ltd primes on ebay. Not worth it

01-15-2009, 05:30 PM	#22
jmc7104 Veteran Member Join Date: Feb 2008 Location: Rock Island, Illinois 61201 Photos: Gallery Posts: 436	Or the statement, "I'm going over to Cannon just after I get done raising all the hell I can dump on Pentax" or to that effect. jim

01-15-2009, 05:46 PM	#23
Douglas_of_Sweden Site Supporter Join Date: Apr 2008 Location: Stockholm Photos: Gallery Posts: 3,374	Originally posted by Lowell Goudge you can add to that will this flash work - and how to measure trigger voltage I just got a K mount lens and the shutter wont trip. ....... Just try it on the camera. If the camera starts to smoke the voltage was too high Or: it's easy, put your tounge on the flash contacts and test-fire the flash. If you can still feel your tounge afterwards the voltage is probably safe Sorry, was this a serious thread?

01-15-2009, 05:52 PM	#24
Douglas_of_Sweden Site Supporter Join Date: Apr 2008 Location: Stockholm Photos: Gallery Posts: 3,374	Originally posted by jmc7104 Or the statement, "I'm going over to Cannon just after I get done raising all the hell I can dump on Pentax" or to that effect. jim I've noticed that if I write the f-word it is sensored into "**" . What about asking Adam if he can adapt that function on some other words so that next time we only have to read: "I'm going over to ** just after I get done..." I guess that should effectively get rid of all posts on how much better *, ** or ** are.

01-15-2009, 06:48 PM	#25
KungPOW Veteran Member Join Date: Nov 2007 Location: Vancouver, Canada Photos: Gallery Posts: 1,699	For someone new to photography, and new to a DSLR, and new to Pentax, finding information on your own can be very difficult. Without SOME background knowledge, how do you search for a solution to the problem you have? Someone who does not know what an aperture ring is, has very little chance of finding out how to use an SMC-M 50/f2 on their brand new K100D. They may not even know what the question is that they need to ask. For all they know, the lens will not work. So we will see the same question over and over. I'm sure the poster knows they are not the first to ask the question, but maybe they are not that savey with the search function, or the results of the search do not look apropriate to the newbie. A newbie that has that M lens, might not realise a post "How to use a lens without an A setting on the aperture ring" is the post they need to read. I think a common questions thread is a great idea. I also think it should be part of the Pentax Knowledge catagory. And new members should get a link in their e-mail. As for the whole "crop factor" thing... I think we all agree that it is a poor name for the effect of a 135 format lens on an aps-c sensor. But, it is the common wording used. Here is my contribution: Crop factor or sensor size field of view effects: 1. Only the field of view is changed, and it is reduced. A comparable field of view is calculated by multiplying the "crop factor" by the lens focal length. For aps-c this id 1.5 2. A reduced field of view changes the 1/focal length rule for shutter speed. The reduced field of view, increases the impact of camera shake, and thus the new rule is 1/focal lenght*crop factor 3. Depth of field for a given f-stop is unchanged. But because your field of view is reduced, you will use the lens at a greater distance from the subject to get similar framing, and the resulting depth of field is greater because of camera to subject distance. 4. Perspective is a function of distance to subject, and is not a funtion of focal length. Closer to the subject gives an expanded perspective, further from the subject gives a compressed perspective. Because the field of view is reduced, a given lens on aps-c will be used further from the subject then the same lens on 135 format. I'm sure I've repeated something previously posted, or I have something wrong, or missed. I expect this will be pointed out. Wheatfield, good luck on your project.

01-17-2009, 03:16 AM	#27
Rense Site Supporter Join Date: Dec 2008 Location: Zetten - The Netherlands Photos: Gallery \| Albums Posts: 9,050	Originally posted by Blue Here's another one for you, PEF or DNG https://www.pentaxforums.com/forums/general-pentax-photography/47086-pef-dng.html#post453843 Yea, or just "RAW or JPEG"?

01-17-2009, 04:42 AM	#28
dazman Veteran Member Join Date: Jan 2008 Location: Melbourne, Australia Posts: 1,949	Filters...should I use them?...Which brand?...Should I get this expensive one or this cheaper one?...and so on and so forth.

01-17-2009, 07:23 PM	#29
Douglas_of_Sweden Site Supporter Join Date: Apr 2008 Location: Stockholm Photos: Gallery Posts: 3,374	Maybe we could make a FAQ file here at the forum? I accidentally found such a file a while ago for Olympus that was really impressive. Perhaps it already exist for Pentax?

01-17-2009, 09:03 PM	#30
Fl_Gulfer Veteran Member Join Date: Jul 2007 Location: Florida Gulfer Photos: Albums Posts: 3,054	Originally posted by Douglas_of_Sweden Maybe we could make a FAQ file here at the forum? I accidentally found such a file a while ago for Olympus that was really impressive. Perhaps it already exist for Pentax? I agree,, most sites have a FAQ section. Why do they say a lens isn't the same MM as listed on the lens when it's on a Digital Camera?

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