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Forum: Mini-Challenges, Games, and Photo Stories 03-09-2013, 11:44 AM  
It's Good to be FEARLESS! - The Heie DA* 16-50 Giveaway
Posted By jstevewhite
Replies: 198
Views: 39,146
This is the only lens I regret getting rid of. I wish I'd kept my original one. It's a great lens and a lot of fun to shoot with.
Forum: Digital Processing, Software, and Printing 05-12-2012, 12:23 PM  
Anyone using a mac?
Posted By jstevewhite
Replies: 89
Views: 10,305
Actually, there's not a lot of difference in actual experienced speed. The CPUs scale up their clock when you place demand on them, and the SSD is fast,fast,fast. RAM is the main problem you'll find. Or at least, the only problem *I* find :D I've had to start closing programs when I'm not using them. But since they start up so fast on the MBA, that's not too bad a problem to have.
Forum: Digital Processing, Software, and Printing 05-12-2012, 12:20 PM  
Anyone using a mac?
Posted By jstevewhite
Replies: 89
Views: 10,305
The only place you'll *really* notice it is if you play a lot of 3D action games. It will do fine with even most of those, but the newest, hottest ones will be a slide show - they're written for much higher performance 3d rendering systems.

You'll discover a lot of other software "feels" faster on the MBA (macbook air) because of the SSD. You click the Safari icon, it bounces once and Safari's up - much faster than any spinning-drive based machine, regardless of clock speed.

You'll need to develop the habit of closing unused apps, though, because you can only get 4GB RAM max... :D
Forum: Digital Processing, Software, and Printing 05-12-2012, 12:17 PM  
Anyone using a mac?
Posted By jstevewhite
Replies: 89
Views: 10,305
The only issue you'll run into with the MacBook Air is RAM. The October 2011 model I own is a dual core 1.8Ghz i7. This is the mobile low power version, and 1.8Ghz is "nominal speed"; it will increase clock speed on demand up to 2.6Ghz in multi-core operation, and 2.9Ghz in single-core operation. Oh, this *will* make the fans kick on... just a warning :D

Because of the high-speed SSD, the Photoshop performance (and actually, the total performance "feel" of the machine itself) is MUCH faster than you'd expect considering the numbers. With most high-res images and memory constrained machines (mac or windows), the photoshop performance limiter is the speed of the scratch disk. In this case, it's MUCH FASTER than any spinning drive available. In sequences that require photoshop to hit the scratch disk, my "1.8Ghz" Macbook Air was FASTER than my "2.8Ghz" Macbook Pro, even though the Macbook pro had 8Gb of RAM and 2.8Ghz processors. Then I put an SSD in the Macbook Pro, and it's faster - but only about 10-12% faster. There's virtually no difference in Lightroom performance between ANY of my three macs: A 2011 Macbook Air, an early 2011 Macbook Pro, and my ca 2008 quad core 3Ghz (Xeon) Mac Pro with 16GB RAM. The Mac Pro still stomps the other two in Photoshop performance, however.

There's about 8% difference between the Macbook Air i7(1.8Ghz) and the Macbook Air i5 (1.6/1.7Ghz).

I find it amusing when I meet people with Toshibas made 3 years ago who suggest that my Macbook air doesn't have the "oomph" necessary to run Photoshop or Lightroom (or other processor) - since the 2011 Macbook Air will outperform nearly every laptop available at that time, including several machines purchased by friends in 2011. Computer performance is ALWAYS mercurial. If you sit down at any two year old laptop and find its performance acceptable, then the new Macbook Air will probably exceed your requirements.

It's worth noting that the current MBA uses Intel's integrated graphics solution. If you play 3d games a lot, this might matter. I've found absolutely no difference in use performance Lightroom between my Mac Pro (ATI HD 5880) and my MBA (GMA3000 or something). Both are lighting fast. The 'abysmal' performance of Intel's integrated video solution is only 'abysmal' compared to much more expensive current discrete chips. It's comparable, again, to last year's nvidia integrated solution, just not *this year's* :D

You're already looking at Macs, so I won't belabor you with the discussion of the superiority of the MBA display or the Unix-based Mac OSX operating system :D

And, it runs Windows 7 like mad, too :D
Forum: Pentax SLR Lens Discussion 01-19-2012, 10:04 AM  
Sigma 30mm f/1.4 thoughts and examples
Posted By jstevewhite
Replies: 395
Views: 94,430
Oh, you know - holiday, work, family stuff, real life, like that. :D Haven't taken nearly as many pix as I'd like to have done. But I do love that 30mm f1.4! How've you been?
Forum: Pentax SLR Lens Discussion 01-17-2012, 12:56 PM  
Sigma 30mm f/1.4 thoughts and examples
Posted By jstevewhite
Replies: 395
Views: 94,430
I love the dreamy feeling this lens gives "kid shots" - pretty images of good lookin' kids there :D
Forum: Lens Clubs 12-15-2011, 01:12 AM  
SIGMA 10-20mm CLUB
Posted By jstevewhite
Replies: 3,709
Views: 752,486
That's a great shot, Designosophy (:D)! Is that the same asylum I keep seeing on all the ghost hunting shows? Love the colors! I need to re-discover my 10-20. I've been stuck on the 30mm 1.4 since I got it, though.
Forum: Sold Items 12-04-2011, 11:02 PM  
For Sale - Sold: Tamron SP AF28-75 F/2.8 XFDi LD Asph (IF) Macro etc etc
Posted By jstevewhite
Replies: 1
Views: 827
PentaxForums.com Marketplace Listing

Item for Sale
Tamron SP AF28-75 F/2.8 XFDi LD Asph (IF) Macro etc etc

Asking Price
300

Item Location
Independence, MO (United States)

Item Description
By "excellent" I mean there are no dings, dents, or scratches. I can see one fleck of dust. The lens is in the original box with manual. It's a great lens, but I've discovered I just don't like short zooms much at all. I've had all of 'em, and this was the last. :D I bought this from a forum member, have no complaints, it's just not my gig. This lens required +3 on my K20D, and -3 on my K5.

Price includes shipping; I'll ship within 24 hours of receiving paypal via UPS or USPS; I'll insure it for purchase price.

Feel free to post any questions you might have!

Are you the original owner of the item being sold?
No

Are you selling or trading this item?
Selling

Item Condition (Key)
Used
Excellent

Shipping Destinations
United States

Shipping Charge
0

Shipping Services
UPS, USPS

Accepted Payment Types
PayPal

Return Policy & Additional Details
I'll accept returns only if item is not as described. Contact me immediately with any questions, but I only guarantee the item matches my description.

Please send me a private message if interested in the item!
Forum: Digital Processing, Software, and Printing 07-27-2011, 03:29 PM  
migrating to Mac - some questions
Posted By jstevewhite
Replies: 14
Views: 1,800
LOL! Revenge, indeed.

A lot of it has to do with how compact they are. It's hard to make the most efficient use of space AND make things technician-friendly. Like removable batteries - taking the plastic case off of them and making them "non-user-serviceable" saved the Macbook Pro/Macbook Air 1/4" in thickness or so at the rated capacity.
Forum: Pentax DSLR Discussion 07-27-2011, 01:58 PM  
Pentax High ISO Gallery - post here
Posted By jstevewhite
Replies: 1,383
Views: 281,054
I see it quite clearly as well, on my Macbook Pro and my Cinema Display.
Forum: Digital Processing, Software, and Printing 07-27-2011, 01:54 PM  
migrating to Mac - some questions
Posted By jstevewhite
Replies: 14
Views: 1,800
Yeah, but these screws are *tiny* and it's often difficult to separate 'em from the tape - even low-tack - without losin' em. (That's the way I used to do it). Plus, for some of the stuff you do in a Mac there are twenty, thirty, or more screws... you burn a lotta tape that way! :D
Forum: Digital Processing, Software, and Printing 07-27-2011, 07:42 AM  
migrating to Mac - some questions
Posted By jstevewhite
Replies: 14
Views: 1,800
HINT: Use an ice cube tray or egg carton to keep your screws in order when you do this swap. :D

ifixit.com has directions and pictures. :D
Forum: General Talk 07-25-2011, 12:43 PM  
Historian David McCullough view of Obama:
Posted By jstevewhite
Replies: 5
Views: 4,002
Doesn't take me any twenty years to see that Obama is center-right rather than progressive left. I knew it when he threw the 'public option' under a bus without the slightest fanfare and at the first sign of Republican resistance.
Forum: Post Your Photos! 07-25-2011, 12:23 PM  
Nature What could have been my last photo ever
Posted By jstevewhite
Replies: 16
Views: 2,041
Like a paraphrase of the old joke: "You have a choice: run away to save your life, or shoot a Pulitzer Prize winning photograph. What focal length should you use?"
Forum: Mini-Challenges, Games, and Photo Stories 07-20-2011, 09:33 PM  
=Capture a stranger street style=
Posted By jstevewhite
Replies: 8,528
Views: 715,266
I stayed with the K20D after seeing the output from the K-7. But I assure you the K-5 is a HUGE upgrade. Not that the K20D isn't still a great camera, I'm just saying - the K-5 isn't the K-7... :D
Forum: Lens Clubs 07-20-2011, 09:29 PM  
SIGMA 10-20mm CLUB
Posted By jstevewhite
Replies: 3,709
Views: 752,486
It's a lot of fun. It's even fun to shoot video with. :D
Forum: Pentax SLR Lens Discussion 07-19-2011, 11:13 PM  
Samyang 35mm f1.4 now Available
Posted By jstevewhite
Replies: 228
Views: 65,406
Yeah, the shorter the lens (in fl), the more trouble i have focusing it accurately on the tiny APS-c viewfinder - I really need AF on the short lenses. I don't have any trouble on the 35mm film camera with a 28, but can't focus it on APS-c to save my life.
Forum: Mini-Challenges, Games, and Photo Stories 07-19-2011, 10:29 PM  
=Capture a stranger street style=
Posted By jstevewhite
Replies: 8,528
Views: 715,266
LOVE this shot. Great expression and context!



This one suggests some connection between the two that probably isn't there, but I like it anyway. :D



Wow! They have the SAME expression, and amazingly similar faces. That's just... creepy!

Great stuff, as always, Javier!
Forum: Pentax K-5 07-19-2011, 07:40 AM  
Why is this handheld picture so sharp?
Posted By jstevewhite
Replies: 30
Views: 5,909
Great points, Rondec. And before people started talking about "crop factors", the advice was *always*: Many factors can affect the slowest speed you can hand-hold your camera. The weight of the camera, your personal strength, whether you had coffee or not, your heart rate, your breathing rate. So start with technique: feet shoulder width, elbows in. Take two slow, deep breaths, and on the exhale of the second, stop halfway, then squeeze the shutter button slowly. Start at 1/fl and see if you get sharp images this way. If not, adjust speed upward; if so, adjust it downward. You'll find your own minimum shutter speed.

Then we discover that what appears sharp depends on final magnification, viewing distance, and the visual acuity of the viewer. Did I say that sharpness (and by extension, DOF and motion blur) are 'fuzzy concepts'? :D
Forum: Pentax K-5 07-18-2011, 11:10 PM  
Why is this handheld picture so sharp?
Posted By jstevewhite
Replies: 30
Views: 5,909
I understand why you say that. However, the 1/fl rule predates its use in 35mm photography - goes all the way back to early 4x5 Speed Graphics at least (it was mentioned in the manual of my first 4x5, ca 1945), and THEY said 1/fl. People who shot medium format used the 1/fl rule with impunity, as well. People used the same rule with half-frame 35mm cameras.

I think it's a generically useful number because of many factors. Also, like so many things, it depends on which direction you work from; depends on your context. E.G., a ~30-35mm lens is "normal" for APS-c. A ~45-50mm lens is "normal" for 135 cameras. The motion blur produced by a 35mm lens at 1/35 on APS-c is roughly equivalent to the motion blur produced by a 50mm lens on 135 (given the same camera motion and same print size). So, it could be said, if we look at 1/fl like everyone does everything else, that is, based on FOV, then the 1/fl rule is still essentially correct.
Forum: Lens Clubs 07-18-2011, 10:44 PM  
The 15mm Limited controls my mind - club
Posted By jstevewhite
Replies: 10,639
Views: 1,634,163
Great lightning work, Matt!
Forum: Mini-Challenges, Games, and Photo Stories 07-18-2011, 12:39 PM  
=Capture a stranger street style=
Posted By jstevewhite
Replies: 8,528
Views: 715,266
So incongruous. Great expression, great shot!
Forum: Pentax SLR Lens Discussion 07-18-2011, 07:24 AM  
Sigma 30mm f/1.4 thoughts and examples
Posted By jstevewhite
Replies: 395
Views: 94,430
Yeah, I agree. Haven't had a chance to shoot anything but family snapshots, but I really like the output. It's even a great movie lens. :D
Forum: Pentax SLR Lens Discussion 07-16-2011, 10:25 PM  
Tamron 28-75 from a da40?
Posted By jstevewhite
Replies: 7
Views: 1,748
I would be MUCH happier with the Tamron 28-75 if autofocus worked properly on my K-5. I can set my AF fine adjust for a single focal length, and it's dead on there, but off at any other setting. Meh.
Forum: Pentax SLR Lens Discussion 07-16-2011, 10:24 PM  
Tamron 28-75 from a da40?
Posted By jstevewhite
Replies: 7
Views: 1,748
That's odd. My FA50 is one of my most reliable focusers. The Sigma 30mm f1.4 is, too. The Tamron 28-75, though... *sigh*. Not so much.
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