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Forum: Pentax DSLR Discussion 06-15-2008, 10:48 AM  
Interesting article, with implications...
Posted By Adam67
Replies: 6
Views: 3,337
If I read correctly an APS-C sensor maxes out at 427MP's at f1.4 and a diffraction-limited lens......however at that aperture no such lens even exists. Now at f5.6 it maxes out at 27MP's but even here you are unlikely to ever come across a diffraction limited lens. At f11 it's 7MP's.

Where do most "real world" lenses fall as far as approaching diffraction limited class? Where do most zoom lenses fall?

It appears that raising the # of MP's in a APS-C sensor sized camera any further is entirely pointless.

It also appears that you would need to drastically increase the sensor size (like to 36x48 format) to see any real gains on increasing the megapixels.
Forum: Post Your Photos! 06-13-2008, 10:59 AM  
No amount of SR...
Posted By Adam67
Replies: 15
Views: 4,436
Yeah.....a .45ACP is inadequate for bear. It does not have anywhere near the penetration of a .44mag (which I would consider the bare minimum for a grizzly). A .454 casull would be even better. Now black bear you might get away with a .357mag......but they tend to be very skittish and generally avoid contact with people.
Forum: Pentax DSLR Discussion 06-13-2008, 09:44 AM  
K200D: strengths and weaknesses?
Posted By Adam67
Replies: 12
Views: 2,071
No problems for me so far.....snaps right into focus. I've had a rare "back focus" but I think every camera does that if your not careful.
Forum: Post Your Photos! 06-12-2008, 10:16 AM  
No amount of SR...
Posted By Adam67
Replies: 15
Views: 4,436
What kind of gun were you packin? I wouldn't shoot (pictures) of grizzlys without at least a 44magnum near by. 98% of the time you'll be fine.....but that 2% can be a bitch. You can't outrun them & you can't outclimb them....and they have no fear of people. Personaly I would swim with sharks before approaching grizzlys or worse yet polars.

Oh....nice shots BTW :)
Forum: Pentax SLR Lens Discussion 06-12-2008, 09:58 AM  
tried the new Tamron 70-200mm on a Canon
Posted By Adam67
Replies: 35
Views: 7,668
I don't know about that. At half the weight and 2" shorter I think the 50-135 makes a MUCH better walk around lens. 70-200 F2.8 is great....but I think the 50-135 would actually spend more time attached to the camera.
Forum: Pentax SLR Lens Discussion 06-12-2008, 09:52 AM  
DA*50-135 any reason not to buy?
Posted By Adam67
Replies: 42
Views: 5,115
2 inches longer and almost double the weight. Something to take into consideration.
Forum: Pentax SLR Lens Discussion 06-12-2008, 09:29 AM  
DA*50-135 any reason not to buy?
Posted By Adam67
Replies: 42
Views: 5,115
Isn't the Sigma 70-200 F2.8 a much bigger and heavier lens?
Forum: Pentax DSLR Discussion 06-12-2008, 08:39 AM  
Are some people over buying?
Posted By Adam67
Replies: 25
Views: 3,147
I read the manual and its home is in the bag....as well as the manual for the flash unit.

I came home yesterday and my wife was using (for the first time) the new camera. She asks me "why does it take it so long to actually take the picture?"

The last time I had used it was on a tripod so the camera was still set to the 2sec. delay.....lol. I fixed it for her (no I didn't need the manual for that one).
Forum: Photographic Technique 06-12-2008, 08:21 AM  
I feel like an idiot!
Posted By Adam67
Replies: 31
Views: 6,986
I would say that list is WAY out of date and questionable at best. Most of the "Ok" dealers on there are not good; some of the "good" one's are questionable and it's missing some "exceptional"(don't really like that term for any of them) ones like onecall & Crutchfield. Most people would classify Adorama as good (or even exceptional going by that list). IMHO all of the "exceptional" ones are good and the rest are questionable except as noted above. I would also classify Buy.com as good as well as Amazon and Ecost.
Forum: Pentax DSLR Discussion 06-11-2008, 08:17 AM  
New K200D Owner Question about "Weather Resistant"
Posted By Adam67
Replies: 12
Views: 2,935
I think you would be fine in a light rain. With a * lens you could shoot in heavy rain.
Forum: Pentax SLR Lens Discussion 06-10-2008, 04:30 PM  
DA*50-135mm users: What else is in your lens kit?
Posted By Adam67
Replies: 8
Views: 2,039
I have the K200D and my plan is to add the 17-70 Sigma (or possibly the Pentax 17-70) and the DA*50-135. That will be my primary bag (Along with the 360FTZ). I will sell my kit lens after I add those. I'll probably add the FA 50 F1.4 as well. Then I'm going to call it a day on lens buying..................................................................yeah right (no really) :confused:
Forum: Post Your Photos! 06-10-2008, 10:41 AM  
L O T R!
Posted By Adam67
Replies: 5
Views: 1,045
LOL.....no kidding.....and now I'm actually trying to save up for a DA* 50-135....go figure.
Forum: Post Your Photos! 06-10-2008, 10:39 AM  
L O T R!
Posted By Adam67
Replies: 5
Views: 1,045
That's weird. They're hosted by Flickr.
Forum: Pentax News and Rumors 06-10-2008, 10:29 AM  
The Next Generation?
Posted By Adam67
Replies: 56
Views: 10,136
When it comes to megapixels when is enough enough? I remember my first digital camera had 3mp (I skipped the big 2mp generation). My next one had 4. Then my brother bought an 8 (Way ahead of the curve) and I thought that was CRAZY! Huge files and slow to download and edit and print; not to mention you could not get very many on a 512mb card.

Now I have 10.2 on my K200D and it's no big deal. My computers are much faster and so are the usb connections. Working with RAW files this size 8 years ago would have been a nightmare.....but now...no big deal.....and that's on my laptop.

Computers are getting faster & faster. Hard dives (and portable solid state media) are getting bigger & bigger (capacity wise)

When is enough enough? What does it take to reproduce poster sized images with no loss in resolution?
Forum: Pentax DSLR Discussion 06-10-2008, 10:01 AM  
Medium Format to DSLR?
Posted By Adam67
Replies: 26
Views: 6,152
Yep...you hit the nail on the head. It appears that most (including myself) still use the 35mm as "The Standard". And since digital sensor size seems to change over time (aren't they getting larger?), we still need a standard to fall back on. It would be nice if the digital SLR manufacturers would start cranking out reasonably priced 35mm sized senors in the majority of their cameras.
Forum: Pentax SLR Lens Discussion 06-10-2008, 09:45 AM  
Yashinon 55mm f/1.8 vs. Pentax FA 50mm f/1.4 -- a nasty and unfair test
Posted By Adam67
Replies: 9
Views: 4,631
Well I don't get it. The first one is not even in focus???

Agreed on not using a TC.
Forum: Pentax SLR Lens Discussion 06-10-2008, 09:17 AM  
"Image as Painting"
Posted By Adam67
Replies: 129
Views: 17,828
I hope you have that framed and hanging on a wall.....that's great.
Forum: Post Your Photos! 06-10-2008, 08:19 AM  
L O T R!
Posted By Adam67
Replies: 5
Views: 1,045
Couple of shots of my Lord of the Rings pinball machine:



Forum: Pentax SLR Lens Discussion 06-09-2008, 10:31 PM  
I am about to pull the trigger...(last minute suggestions wanted)
Posted By Adam67
Replies: 28
Views: 4,217
Nice choice.....I like this better than your original set up. Those are great lenses.
Forum: Pentax DSLR Discussion 06-09-2008, 09:34 PM  
Shake reduction and the use of a tripod
Posted By Adam67
Replies: 25
Views: 3,330
No.

Try as you might....neither you or any other human can "hold" a camera as steady as a decent tripod. Ever shoot a handgun? When I hold a pistol with one hand and aim it at a target 50 yards away that little red dot (on my red dot scope) dances all around the middle of the target. Two hands a little less so but still dancing around. Bench rest, much better but still some movement; hands off with the gun locked in a ransom rest.....now the dot ain't movin'.

If your holding it....use the SR function.
Forum: Photographic Technique 06-09-2008, 09:26 AM  
Why edit RAW files?
Posted By Adam67
Replies: 16
Views: 5,122
I'm with you.....well sort of. I tweak almost all of my pictures (so far anyway) before converting to jpg. Silkypix does such a nice job that I have not had to tweak any of my jpg's afterwards. I love the "tastes" that allows you to save unique settings in Silkypix.
Forum: Pentax SLR Lens Discussion 06-08-2008, 10:12 AM  
Tokina f8 mirror lens
Posted By Adam67
Replies: 61
Views: 29,104
Thanks.....mine looks just like yours with the checkered focus ring :)

edit: It does say 55BB on it
Forum: Pentax SLR Lens Discussion 06-07-2008, 09:31 PM  
tele zooms?
Posted By Adam67
Replies: 12
Views: 3,140
I have the Sigma 70-300 APO Macro and for the price it's tough to beat. I've taken some great shots with it.
Forum: Pentax DSLR Discussion 06-07-2008, 09:23 PM  
Determining the number of actuations..
Posted By Adam67
Replies: 5
Views: 1,737
Interesting.....according to PhotoME my smc DA 18-55mm AL II is a DA* lens :hmm:
Forum: Pentax DSLR Discussion 06-07-2008, 09:06 PM  
Shake reduction and the use of a tripod
Posted By Adam67
Replies: 25
Views: 3,330
Two things:

1) You can never stand and hold as steady as a tripod.
2) The "SR" feature is designed to counter rather large movements (relatively speaking) A slight breeze or you very carefully pushing the shutter (really you should use a remote shutter release or the timer when mounted on a tripod....always.) or the minute vibrations from the floor are not what it's designed for. When mounted on a tripod if the SR function is left on it can and most likely will introduce movement. When it's on it's sort of "looking for movement to counter".....if there is none it still could affect the shot simply by attempting to counter movement that isn't there......so to speak.
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