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Forum: Pentax Price Watch 02-24-2019, 08:17 AM  
Some Pentax holiday specials still available including K-1 with lens
Posted By Ikarus
Replies: 4
Views: 630
Looks like the K-1 Mk I deal is gone now. The page still exists, but you can't put it in the cart anymore.
Forum: Pentax Price Watch 01-08-2019, 09:47 AM  
3 Lensbaby Lenses - All 75% Off!
Posted By Ikarus
Replies: 53
Views: 2,827
Still showing. That's odd. One would think they would have noticed the error by now, or, if it wasn't one after all, they would have flown off he shelf. The same item on Amazon goes for $299.
Forum: Pentax Price Watch 01-04-2019, 09:52 PM  
3 Lensbaby Lenses - All 75% Off!
Posted By Ikarus
Replies: 53
Views: 2,827
And they keep running this kind of baiting scheme... here is the Lensbaby Composer Pro II with Sweet 50 for Samsung NX for $100. If you can get it, that is.
Forum: Pentax Price Watch 01-02-2019, 04:26 PM  
3 Lensbaby Lenses - All 75% Off!
Posted By Ikarus
Replies: 53
Views: 2,827
I didn't get a cancellation notice either, but you guys got it good, if you can at least verify online that the order has been cancelled. Apparently, if you've checked out the item without creating a customer account, all you get is an 'unregistered user' pop-up when you click on the 'check order status' link in their confirmation email. That's a backwards way of saying the same thing, I suppose. Anyway, that's truly disappointing. I was expecting better of Adorama.
Forum: Pentax Price Watch 11-30-2018, 09:51 AM  
Pentax K-1 & D-BG6 Grip $1,490.69
Posted By Ikarus
Replies: 8
Views: 630
No worries, you don't owe me anything. It was worth a shot, but probably just too good to be true. My K-3 still serves me fine, so I don't really 'need' a K-1, and if I did, they are still available new for more than decent prices: 1500 on Amazon, and Ricoh still shows it with the 28-105 for 1800.
Forum: Pentax Price Watch 11-29-2018, 09:46 PM  
Pentax K-1 & D-BG6 Grip $1,490.69
Posted By Ikarus
Replies: 8
Views: 630
They do deserve their poor online reviews. I clicked on the order status link in the confirmation email just now and it shows as 'order canceled'. Mind you, up to now they didn't bother to let me know, even though they had no qualms about immediately starting to spam me with unrelated emails after I had placed the order. So yeah, they definitely cannot be recommended.
Forum: Pentax Price Watch 11-27-2018, 10:21 AM  
Pentax K-1 & D-BG6 Grip $1,490.69
Posted By Ikarus
Replies: 8
Views: 630
Alright, this finally did it for me. Online ratings for this merchant are not great, but BBB has them at A+. I suspect they don't have the item in stock, but rather drop ship from Ricoh. Anyway, I am not in a rush. I placed the order, will let you know how it goes.
Forum: Pentax SLR Lens Discussion 01-18-2018, 01:49 AM  
DA 10-17 FE usage tips/quirks/limitations
Posted By Ikarus
Replies: 25
Views: 1,494
Easily one of my favorite lenses.

Nave by Ludger Solbach, on Flickr

Memorial Point by Ludger Solbach, on Flickr

Koi by Ludger Solbach, on Flickr
Forum: Monthly Photo Contests 12-02-2017, 10:31 AM  
Sneaking Up
Posted By Ikarus
Replies: 5
Views: 174
Forum: Pentax Price Watch 11-28-2017, 05:06 PM  
HD DA 55-300mm WR - $40 Off Cyber Monday Deal
Posted By Ikarus
Replies: 1
Views: 1,367
Nice one! Probably good this didn't happen a week ago, because I might have been tempted to get this over the 4.5-6.3 PLM as a replacement for my damaged DA-L version. Now, after experiencing the blazing focusing speed, I'm positive I can't go back to screw drive anymore.
Forum: Pentax SLR Lens Discussion 10-11-2017, 08:05 AM  
What's the best Pentax prime?
Posted By Ikarus
Replies: 171
Views: 12,476
The original post used "dollars over rating" and sorted low to high. I used "mean-subtracted rating over dollars" and sorted high to low, the benefit being that you avoid division by zero for a lens that hits the mean rating.
Forum: Pentax SLR Lens Discussion 10-11-2017, 12:47 AM  
What's the best Pentax prime?
Posted By Ikarus
Replies: 171
Views: 12,476
Evidently. :) I was trying to prove to you that subtracting the mean rating before computing the ratio results in a more sensible rank ordering of the lenses.
Forum: Pentax SLR Lens Discussion 10-10-2017, 06:30 PM  
What's the best Pentax prime?
Posted By Ikarus
Replies: 171
Views: 12,476
Well, let's just try, shall we? Previous first three:

1 SMC Pentax-M 50mm F2 8.22 24 (91) 2.92
2 SMC Pentax-A 50mm F2 7.84 34 (63) 4.34
3 SMC Pentax-M 50mm F1.7 9.38 41 (207) 4.37

Let's say the average lens rating is 8.22 (I don't actually know, I assume it's probably more around 8.5). After mean subtraction, the ranking according to the "mean-subtracted rating divided by dollars ratio" is:

1 SMC Pentax-M 50mm F1.7 +1.17 41 (207) 0.03
2 SMC Pentax-M 50mm F2 0 24 (91) 0
3 SMC Pentax-A 50mm F2 -0.38 34 (63) -0.01

Considering the other lenses on that list all have a rating above 8.22, the two 50mm F2 would actually end up all the way at the bottom. Makes a whole lot more sense like this.
Forum: Pentax SLR Lens Discussion 10-10-2017, 09:49 AM  
What's the best Pentax prime?
Posted By Ikarus
Replies: 171
Views: 12,476
The ratings scale being heavily biased towards the 10 end of the scale is the key problem here. If you do the same exercise with the mean rating across all lenses subtracted from the actual, you'll get a very different picture. Your current bargain leader will definitely no longer be at the top, as it shouldn't be.
Forum: Pentax DSLR Discussion 10-05-2017, 08:34 AM  
DPReview High ISO Noise D850 vs K-1
Posted By Ikarus
Replies: 29
Views: 3,013
I agree it's nitpicking, but it's fun, isn't it? To my eyes, the best quality output is from the K-1 with pixel shift enabled. In the lithography section, it cleanly resolves all the vertical lines without any moire artifacts whatsoever. It beats the pants off the D850 at half the price. What a camera!
Forum: Pentax DSLR Discussion 10-05-2017, 07:35 AM  
DPReview High ISO Noise D850 vs K-1
Posted By Ikarus
Replies: 29
Views: 3,013
Where did I say I love it? How much clearer could I be by calling it "a moire and CA feast of epic proportions"?

That doesn't take away from the fact that the D850 shows more detail, albeit some of it false. Personally, I'd rather not see one if it comes with the other, since one cannot tell which is which.

Interestingly, the K-1 shows a milder form of the same type of artifact in this section for higher ISO, e.g. 400 and 800.
Forum: Pentax DSLR Discussion 10-04-2017, 06:12 PM  
DPReview High ISO Noise D850 vs K-1
Posted By Ikarus
Replies: 29
Views: 3,013
Which part? The D850 has no AA filter, and it shows in the lithography part of the image. Whether or not the K-1 had the AA simulator enabled, they don't seem to say, which is a bit odd, because they do provide the pixel shift setting as an alternative option for the K-1. I do suspect it was on, though, because the resolution of the D850 is much better and the moire much worse than the difference in pixel density between the sensors would explain.

I don't understand how folks can say that the resolution is similar between the two. If you select ISO 100, raw, image size 'full', and the rear wall in the scene of the lithography image, you see a very fine, well-defined square pattern with lots of colorful moire in the D850 image, whereas in the K-1 rendering it's all a wash but without the CA artifacts. That said, I agree that lens differences or subtle focusing errors could be the cause as well.
Forum: Pentax DSLR Discussion 10-04-2017, 03:10 PM  
DPReview High ISO Noise D850 vs K-1
Posted By Ikarus
Replies: 29
Views: 3,013
To me, the D850 is visibly sharper than the K-1 in low ISO for raw images. I suspect this is because the K-1 had the AA simulator enabled, whereas the D850 has nothing of the sort. The price to pay for the increase in sharpness is visible in the lithography scene on the left that the D850 turns into a moire and CA feast of epic proportions at ISO100.
Forum: Pentax SLR Lens Discussion 09-29-2017, 12:44 PM  
Blind test: Guess the lens (8 x 135mm)
Posted By Ikarus
Replies: 30
Views: 2,456
Overall, I see very little between them for these two sets. The notable outlier is lens #4, which has a downright nasty looking bokeh in the f/8 set. I'm thinking this might be the Fujita.
Forum: Pentax Price Watch 09-17-2017, 11:37 AM  
20% Off Through RAKUTEN
Posted By Ikarus
Replies: 4
Views: 926
Coupon is apparently dead and no longer advertised on their front page. Looks like they had a low limit on the maximum number of coupon users, even though the expiration date of 9/19 was suggesting it was going to be available to many, and this was just a ploy to get people to sign up on their sh*tty site.
Forum: Pentax Price Watch 09-17-2017, 09:39 AM  
20% Off Through RAKUTEN
Posted By Ikarus
Replies: 4
Views: 926
Good catch, if only it worked!

I get all the way to the payment confirmation page for the 55-300 PLM from Adorama, when I get

"We're sorry! This coupon cannot be applied because the coupon usage limit has been exceed." (sic!)

Seems others have the same issue, see here.
Forum: Winners' Showcase 02-01-2017, 11:08 AM  
February, 2017 Third Place: Bench
Posted By Ikarus
Replies: 20
Views: 1,093
Bench by Ludger Solbach, on Flickr
Forum: Lens Clubs 08-22-2016, 10:25 AM  
Fisheye Fever Club -- Flaunt your fisheye photos!
Posted By Ikarus
Replies: 3,226
Views: 572,128
The Pentax 10-17 @ 13mm, essentially de-fished
Sand Beach Harbor by Ludger Solbach, on Flickr
Forum: Pentax K-3 05-29-2016, 11:30 AM  
K10d upgrade Do I get a K3 or K1 full frame
Posted By Ikarus
Replies: 26
Views: 3,069
Not in the least. I was responding to the following statement of yours: "The sensor size has no impact on DOF." If that was meant to say "The sensor size has no relevance for DOF when one is not operating at wide open aperture.", we have no disagreement.

---------- Post added 05-29-16 at 11:41 AM ----------



Yes, aka flip-side of the coin. For tele work, APS-C is definitely compelling. For shallow DOF, I'd go with FF.



To me it's less about matching them than knowing your trade-offs and one thing that's important to understand is that they really are significant only for the corner cases (low light, long distance, shallow DOF, high magnification, etc). For everything in between, i.e. the vast majority of shots, people will be hard-pressed to tell the difference between APS-C and FF.
Forum: Pentax K-3 05-28-2016, 10:21 PM  
K10d upgrade Do I get a K3 or K1 full frame
Posted By Ikarus
Replies: 26
Views: 3,069
Sure, except that in order to match FOV and DOF of a FF 50mm f1.4 shot, one needs a 35mm f1.0 on APS-C, so good luck with that!
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