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Forum: Pentax News and Rumors 11-15-2017, 03:03 PM  
DxO score for Pentax 645Z: 101!
Posted By Dave L
Replies: 134
Views: 14,639
The review makes it appear as if the Hasselblad is fractionally better than the 645Z at an almost identical price - but that is misleading, at least in the UK where the 645Z body costs 5,499 (at SRS) and the Hasselblad 7,787 (cheapest price with grey imports ignored in both cases). Either way it's a lot more expensive for that 1% 'gain' - at least over here, even last month when 645Z cost 6,499 but right now it's a bargain.
Forum: Pentax News and Rumors 11-14-2017, 09:50 AM  
Mitakon Speedmaster 135/1.4 now for Pentax?
Posted By Dave L
Replies: 32
Views: 5,260
Maybe closer to 10 than 100. According to this unverified report: Mitakon Speedmaster 135mm f/1.4 Lens Hands On Images | Camera News at Cameraegg

only 100 copies of the original (no Pentax mount) release of this lens were made. Presumably, they sold them all.

But I have enough trouble focussing my manual Pentax-M 50mm f/.1.4 so not for me, whatever the price!
Forum: Pentax K-1 01-10-2017, 09:43 AM  
IBIS failure at -28C temp
Posted By Dave L
Replies: 114
Views: 6,672
Well it can't even be tested here in the UK as the coldest air temperature EVER officially recorded here is -27.2 deg C. :lol:

-10 C is rare here and that's the spec limit, so if it works anywhere below that it's a bonus wherever you are I guess. Someone mentioned the max. humidity spec. though, 85%, and that we can readily test, all my Pentax cameras have always worked just fine at our commonplace 100% humidity. In fact, it's 88% right now, and not even a rainy day.
Forum: Pentax Film SLR Discussion 11-06-2016, 09:31 AM  
Safe Light or Dark Bag
Posted By Dave L
Replies: 30
Views: 2,911
Thanks for all the helpful comments. Sadly I don't have any B&W undeveloped film to practice with, nor do I have a working SLR camera any more. :( But I keep finding more unprocessed C-41 films around the house so by the end I will be well practiced. Have been testing different volume water baths and I can achieve and maintain 38C to within half a degree for over 5 minutes even without topping up, and no water heater. My two digital clinical thermometers are very useful at that temperature.

My 'new' vintage 35U seems to be in good working order, is undamaged and seems very easy to use, though I don't yet have the chemicals. To simplify matters, I am thinking of ordering initially a digibase pre-diluted solution 3 x 500 ml C-41 kit but as I intend to process initially only one film a day, I don't know how long the solutions will remain usable (if stored in sealed 500ml bottles). A month would be fine, but will they last that long?
Forum: Pentax Film SLR Discussion 11-04-2016, 07:53 AM  
Safe Light or Dark Bag
Posted By Dave L
Replies: 30
Views: 2,911
Thanks for the tips, I will definitely practice temperature control as you suggest, before doing any actual processing!

One question though, is it best to err on the side of (very slight) coolness rather than over-heating, assuming the same developing time? If the main effect would be low contrast negatives, I might be able to correct that in software after scanning into my computer?
Forum: Pentax Film SLR Discussion 11-03-2016, 09:59 PM  
Safe Light or Dark Bag
Posted By Dave L
Replies: 30
Views: 2,911
Just got a 35U on Ebay at 50/$60, so I can process and scan a dozen or more old films I've found around the house. The total cost with chemicals will probably be more than getting them developed professionally but I want to control the process myself, and I may well find more old films anyway. It's 20 years since I did any home developing, C- 41 temperature control could be fun!
Forum: Pentax K-1 10-03-2016, 03:19 PM  
Price rise
Posted By Dave L
Replies: 12
Views: 1,615
Pound versus yen has gone down by 17% since April, so the 12.5% price rise isn't bad. But it could get worse (due to the vote to leave the EU). Some will say 'we told you so'! ;)
Forum: Pentax News and Rumors 10-03-2016, 03:01 PM  
K-1 price hike
Posted By Dave L
Replies: 163
Views: 23,324
The British pound has depreciated by 17% against the Japanese yen since K-1 was released, mainly due to the Brexit vote. So K-1 is still good value at 1799, which is a mere 12.5% price increase. There could well be a further price increase in the UK as the pound will probably never recover to its pre-Brexit levels and could dip further.

We are paying the price of voting to leave the EU. In the US, be thankful for small mercies as your price rises won't get near what we'll see in the UK. There will be no escape to other brands either, as all UK-imported camera brands (so all of them!) will have to see similar price increases when current stocks run out.
Forum: Troubleshooting and Beginner Help 06-28-2016, 03:39 PM  
K1 Mode Dial Failure
Posted By Dave L
Replies: 226
Views: 32,698
I'm close to pulling the trigger on a K-1 because here in the UK, the prices are likely to rise this year due to the recent drop in the pound versus the dollar and yen. So I've checked my rights, in case mine should fail. Other UK readers may be interested in these extracts:

For the first 30 days, you are entitled to a replacement or refund if there's a fault (apart from misuse). Let's you go elsewhere to buy, if you need to.

For the next 5 months, any fault is assumed to have been there from the start unless the seller can prove otherwise. And you can get a full or part refund instead of repair if either of the following applies:
  • a repair or replacement would cause you significant inconvenience

  • the repair would take an unreasonably long amount of time.

So in the UK, we should not have to rely on the goodwill of the seller or Ricoh in many of the problem cases mentioned in this thread, we could demand a refund if necessary and go find our own replacement. Within the first 6 months. It puts my mind at rest, I think I will pull that trigger.
Forum: Pentax SLR Lens Discussion 06-04-2016, 07:45 AM  
DA *200 uses other then birding
Posted By Dave L
Replies: 31
Views: 2,310
Theme parks. My new (this week!) DA* 200 on a K-3 handled fast moving rides quite well yesterday at Paultons Park in the UK. It was difficult to grab many of the shots but the focus on AFC at f/4 was fast enough to produce some really good cropped family shots, something I could never do with my old 55-300, and my DA* 300 has too narrow an angle of view to pick up the cars quickly enough as they shoot into the frame and are gone (tried that last year). Privacy deters me from posting the family shots but I did a random test shot of others on the Magma, it shoots people high up into the air. Full frame (just a slight edge crop of overcast sky); medium crop and a 100% crop. PP is minimal or absent (can't remember which). Purple fringing is apparent, but I think it can be fixed inn PP.

I set ISO at 400 ready for the fast rides to follow and guessed at +1 EV exposure compensation. I like how it stows in the backpack with lens hood in place, something I cannot do with the DA* 300. Delighted with it and will probably use it now more than the DA* 300.


Paultons Park - Magma by Dave L, on Flickr


Paultons Park - Magma by Dave L, on Flickr


Paultons Park - Magma by Dave L, on Flickr
Forum: Pentax SLR Lens Discussion 06-02-2016, 04:58 PM  
Am I crazy for only wanting 3 primes? (for now...)
Posted By Dave L
Replies: 144
Views: 7,444
Well tomorrow I'm heading out to a theme park with the grandkids and I have decided to take my new DA* 200mm on the K-3, and the 40mm XS on my K-5, one of the kids can use that 'on the green' and I can grab it if I have to (that combination is smaller and lighter than some of my lenses!). The 10-17? No, I think the 15mm Limited gets the vote!

I love my primes. :D
Forum: Pentax SLR Lens Discussion 06-01-2016, 06:24 PM  
New Generation of * lenses
Posted By Dave L
Replies: 18
Views: 2,233
Well I struggled with this problem and when I worked it all out, went for the primes. Here's the comparison (UK street prices):

1849 DA* 70-200 f2.8 - 2030 grams
-----------------------

779 DA* 200 f2.8 - 825 g
459 DFA 100 f2.8 - 340g
329 DFA 50 f2.8 - 265g
---------
1567 - 1430 g.

Same apertures, wider range, cheaper, lighter. Less convenient in action of course but the individual lighter weights help a lot, and there may be questions about the DA* 200's edge quality on K-1. But ouch! That weight is what puts me off bigger wide aperture zooms. Even if adding a 55-300WR (279, 466g) as backup still ends up with the 4 lenses weighing and costing the same as the zoom.

The decision was far from clear cut but I now have the 100 DFA, 200 DA*, 300 DA* and 1.4 converter to handle my telephoto needs, much as the zoom tempted me!
Forum: Pentax SLR Lens Discussion 05-24-2016, 01:44 PM  
Understanding folks saying a TC doesn't ad more detail.
Posted By Dave L
Replies: 36
Views: 3,392
That when cropping you can see more detail when using a good enough teleconverter/lens combination than with the lens alone. I said 'in the middle bit' because the edges may be vignetted, and the lens resolution may be less, in which case you might not see any improvement at all. But in the image centre, you will - and I do, with my DA* 300 mm + 1.4TC + K-3 combination.
Forum: Pentax K-1 05-24-2016, 10:02 AM  
K-1 and Pentax DA 1.4 converter: surprising results
Posted By Dave L
Replies: 35
Views: 3,859
In other words, the middle bit of your 36MP sensor becomes in effect the middle bit of a 72MP sensor so if you are only interested in the middle bit (moon shots, distant planes, birds... and squirrels), and if your prime lens and the TC combination are up to the job, you can see more detail. In the middle bit.
Forum: Pentax K-1 05-20-2016, 09:07 AM  
So... what's the crop mode like?
Posted By Dave L
Replies: 48
Views: 5,799
Have no fear, if I eventually succeed, I will be sure to post the pics in the K-1 Camera Porn thread. :lol:
Forum: Pentax K-1 05-20-2016, 08:21 AM  
So... what's the crop mode like?
Posted By Dave L
Replies: 48
Views: 5,799
Well I wish I'd had a K-1 this afternoon to help me take some nice shots with my DA* 300 of birds play-fighting (pre-mating action!) in the garden. Try as I might, I just couldn't react fast enough with the K-3 to keep them in the frame and once they'd left the frame, I had no idea where they were! Full frame viewfinder is what I needed, in whatever mode and with everything visible... and perhaps a faster focussing camera-lens combo of course. I'd probably have used crop mode to get the faster burst rate.
Forum: Pentax K-1 05-16-2016, 06:31 AM  
Pixel shift experiment
Posted By Dave L
Replies: 45
Views: 3,230
The question is, can you extract one of the single images from the PS RAW?

I'm sure I've read the answer somewhere but I can't recall what it is!
Forum: Pentax K-1 05-16-2016, 06:15 AM  
Sigma announcement about K-1 lens issue
Posted By Dave L
Replies: 347
Views: 33,302
But there has been an announced fix by Sigma - so everyone will know it's Sigma's fault... and the fix means that the problem is temporary anyway. I can't really see this harming Pentax sales significantly.
Forum: Pentax K-1 05-13-2016, 02:13 AM  
Sigma announcement about K-1 lens issue
Posted By Dave L
Replies: 347
Views: 33,302
True, that's the kind of thing I was hinting at by 'pressure' and 'who knows what?', slight body or lens mount distortion is possible too, slight loosening of the mounted lens on other cameras or in the future, tiny bits of scraped plastic getting inside the lens or body, who knows what. But I'm sure some people are willing to take the risk as none of this is certain or for them is insignificant.
Forum: Pentax K-1 05-13-2016, 01:27 AM  
Sigma announcement about K-1 lens issue
Posted By Dave L
Replies: 347
Views: 33,302
Glad to see it's usable, but the gap may well allow dust grit or water to get in a bit easier than before, and there must be some pressure where there should be none. Who knows what that could lead to in the future, so it's not *only* a cosmetic 'scratch' issue as Sigma imply. Glad they seem to be willing to provide a fix, and though the announcement doesn't explicitly say it will be a 'no charge' fix, I would expect that to happen.
Forum: Pentax K-1 05-12-2016, 06:30 AM  
Sigma announcement about K-1 lens issue
Posted By Dave L
Replies: 347
Views: 33,302
That was exactly the main point of my post, and an earlier post I made last night!

Either Sigma knew what the specification was and chose to go outside it, or they did not know the full specification (perhaps because they wouldn't pay Pentax for it) and had to guess but guessed wrong. Either way, I think they know they messed up and will fix the lenses for free though it may take quite a long time.
Forum: Pentax K-1 05-12-2016, 04:44 AM  
Sigma announcement about K-1 lens issue
Posted By Dave L
Replies: 347
Views: 33,302
Yes but that's presumably because Sony changed the mount or enhanced it, so obviously older lenses won't work with the changed bits just as my Pentax M lenses won't fully work with any automatic or digital Pentax camera. They still fit the newer K-mount cameras though, and still do what they did when i bought them. If they could no longer even be mounted on a newer K-mount camera, that's something so basic that I'd have a claim... for a few years anyway (about 6 in the UK I think but it depends on how long they are expected to last).

If Sigma sold their lenses as being compatible with "all current digital K-mount cameras" things would be different, but they don't because they know that they'd sell fewer lenses if they did that.
Forum: Pentax K-1 05-12-2016, 04:21 AM  
Sigma announcement about K-1 lens issue
Posted By Dave L
Replies: 347
Views: 33,302
I'd say it's the other way round. K-mount Sigma lenses weren't sold as being compatible with specific K-mount cameras but implicitly with all K-mount cameras and buyers were entitled to think that would continue with future K-mount cameras (as long as the future cameras were within the mount specs.). So if K-1 is within spec and lenses sold were outside the spec. as it was when sold, it's ultimately Sigma's problem.

But if someone today buys a Sigma lens and the seller points out that it may not fit K-1 or will mark the body, it's the buyer's problem.
Forum: Pentax K-1 05-12-2016, 04:07 AM  
Sigma announcement about K-1 lens issue
Posted By Dave L
Replies: 347
Views: 33,302
The lenses are sold as lenses for [digital] SLR cameras with a Pentax lens mount and if they don't correctly fit digital cameras with a Pentax lens mount (without damaging the camera), they were mis-sold, as long as the camera concerned meets the lens-mount specifications (including any specified clearances etc.). Whether or not the camera model existed when the lens was sold is irrelevant.

If it doesn't fit correctly, the lens is not fit for purpose and not as described (UK law) or whatever the relevant legal wording is in other Countries. Unless Pentax themselves stepped outside the K-mount design specifications with the K-1, Sigma will have to modify or replace and pay for all their non-compatible lenses to be fixed. I am sure they will, and so they should, though initial complaints in the UK are against the seller, not Sigma (sellers would then have a claim against Sigma).
Forum: Pentax K-1 05-11-2016, 06:00 PM  
Sigma announcement about K-1 lens issue
Posted By Dave L
Replies: 347
Views: 33,302
I've just read the entire thread and very interesting it is too, many thanks to all for working out exactly what's going on and why.

I've read some comments about who will have to pay the cost of adapting the 'oversize' Sigma lenses, well I can only speak for the UK (which will be similar to the rest of the EU) and it's fairly clear that it must ultimately be Sigma - though the owner's initial complaint is with the seller. Under the UK's Consumer Rights Act 2015 (as with the earlier Sale of Goods Act), "all products must be of satisfactory quality, fit for purpose and as described.".

Sigma lenses are sold as follows by one major retailer: "This 50-500mm f/4.5-6.3 APO DG OS HSM Lens from Sigma is a zoom lens for digital SLR cameras with a Pentax lens mount. The lens has a standard to ultra telephoto zoom range that is ideal for nature, wildlife, or sports photography. The range translates into an equivalent 75-750mm when used with digital SLR cameras with an APS size chip. The lens is also compatible with full frame cameras."

A Pentax lens mount clearly means a standard Pentax lens mount, so if the lens does not correctly fit a DSLR with a standard Pentax lens mount, it is neither fit for purpose nor as described.

In this case, as long as Sigma or Pentax agree that the mount is outside K-mount specification, and it looks like it is, UK (and probably EU) purchasers should be able to obtain a replacement or repair up to 6 years after purchase... and possibly longer (but I am no legal expert on this). It wouldn't surprise me if for the sake of their good name, Sigma agree to fund the cost of repair or replacement of ALL affected lenses in all Countries but we shall see. If not, they are going to have a lot of small claims court cases to deal with, in the UK at least. ;)
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