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Forum: Pentax SLR Lens Discussion 10-20-2017, 06:03 PM  
Best place for lens repair?
Posted By tibbitts
Replies: 9
Views: 444
That isn't exactly a "classic" lens or a "classic" problem, so I'm guessing there's effectively no choice in the U.S. but to send it to Precision. They did a good job with my 60-250 (under warranty), but I'm sure repairs won't be cheap. I know Eric does MF-era bodies and lenses but that's not what you have. Maybe someone else has a different experience.
Forum: Pentax SLR Lens Discussion 10-11-2017, 08:19 PM  
Trade 18-135 for 16-50?
Posted By tibbitts
Replies: 20
Views: 1,131
I'd consider the 16-85 for most purposes more than the 16-50 or 18-135, although it too has its issues.
Forum: Pentax Camera and Field Accessories 10-11-2017, 08:12 PM  
Height of Slik Pro 330DX without center column
Posted By tibbitts
Replies: 4
Views: 512
I only have a 700DX which I like very much, but just wanted to mention how annoying it is to me too to not have standardized measurements readily available from all the manufacturers. Sometimes you can't tell if a manufacturer includes center columns or even heads in the case of models packaged with a head.

If I had to guess the answer it would be "not enough."
Forum: Pentax DSLR Discussion 10-08-2017, 09:05 AM  
Worth waiting for the K-3II Successor?
Posted By tibbitts
Replies: 64
Views: 4,454
Although it wouldn't be everything everyone here is looking for, I think if Pentax took a K3 and did nothing but update the sensor, processing power, and software, added a movable LCD, and slapped III on it, enough people would buy it to make it worth a production run. The highest cost part of that would probably be the LCD - if they skipped that they might still sell enough to get a payback and more importantly, keep APS fans from jumping ship for another couple of years.
Forum: Pentax Camera and Field Accessories 10-07-2017, 08:33 PM  
Mountainsmith Tanack 10L Lumbar Pack
Posted By tibbitts
Replies: 3
Views: 413
I have waist packs, but can seemingly wear them anywhere around the waist - front, back, or side. I don't have a shoulder harness for mine but it would be nice when they've got a K5 and 3 or 4 lenses stuffed inside (especially when one of them is that 60-250.) Mine are discontinued Tenba and Tamrac models - plus I have an old Spiratone that needs one piece of padding replaced. For longer hikes I'd strap the Spiratone to the bottom of the frame of my frame pack - very comfortable.
Forum: Pentax News and Rumors 09-04-2017, 12:45 PM  
Any more news on the new Tamron 16-300?
Posted By tibbitts
Replies: 91
Views: 19,190
I guess one of the cheaply built mediocre quality lenses is the FA 15-30mm for example, and apparently Pentax is accepting somewhat less than 1.5x for that. I'm just saying I don't understand the reason for not doing the same, maybe at a $200 price premium or whatever, for more lenses. The idea is to grow the ecosystem and remove an objection to entering the Pentax system. As much as some people here resent superzooms, we also periodically have posts advising not to change lenses in various environments, so we can't exactly claim that superzooms don't have a place. I suppose you can argue Pentax should limit its market to people willing to buy and carry three bodies and lenses around but I'm not sure that's a winning strategy.

When I bought into Pentax the 16-45 was a big factor for me due to the lack of affordable 16-whatever alternatives for other systems. Maybe some people feel the same way about superzooms that either have a lower-end or higher-end than what Pentax offers now, and I'm not sure the newer Tamrons don't outperform their older superzooms, so I don't see the harm in going that route. The objective is to grow the Pentax ecosystem and hope for a bigger pool of money eventually by not turning people off due to lack of a product when you can somewhat easily avoid it. It's not unlike the software industry where companies sometimes effectively subsidize competitors because they hope for an eventual positive impact by growing the acceptance for their own related products.

As for "only a few", if you mean superzooms the definition of them has changed over the years (and arguably superzoom lenses predate the use of the term), but in general there have been a lot of rebadged Tamrons and other 3rd-party-manufactured lenses in the Pentax lineup. No, not in screw-mount era that I know of, but subsequently.
Forum: Pentax News and Rumors 09-04-2017, 10:49 AM  
Any more news on the new Tamron 16-300?
Posted By tibbitts
Replies: 91
Views: 19,190
Since Pentax has for a while and continues to sell a variety of Tamron lenses, including "superzooms" (and what were superzooms in their day) with the name Pentax on them, a variety of those have apparently met Pentax's standards over the years. And Nikon (and Canon and Sony, if you still count 18-200mm at least) sell their own superzooms with their own names on them, so by definition superzooms meet their IQ standards too. This has been going on for a while. You might recall the original 43-86mm Nikkor - arguably a superzoom in its day. I think it would be hard to argue that Nikon has higher IQ criteria than... anybody, based on that lens. :-)

---------- Post added 09-04-2017 at 10:59 AM ----------


That was the exact situation with me when I started with Pentax digital, just a few years earlier (2007, k100 era.) I had owned Pentax in the Spotmatic era but didn't have any legacy lenses to be concerned with - I was interested in value and Pentax had some unique elements that nobody else did at the time. Pentax is still competitive but the 3rd party lens availability wasn't as bleak at the time, and some of the advantages have evolved away over the years. More choices in lenses would bring Pentax back closer to where it was, and I'm just saying that if the market alone won't support that, then Pentax rebranding is better than nothing.
Forum: Pentax Camera and Field Accessories 09-03-2017, 06:07 PM  
What filter system for da 12-24
Posted By tibbitts
Replies: 12
Views: 946
Oh, that's three slots. But the 1-slot model (sorry I don't have the number) almost surely won't. I don't believe they made the one-slot model many years ago, so I cut the two front slots off with a saw for my 17mm lens (on 35mm.)
Forum: Pentax News and Rumors 09-03-2017, 05:56 PM  
Any more news on the new Tamron 16-300?
Posted By tibbitts
Replies: 91
Views: 19,190
I don't understand your point. As far as I know a number of Pentax lenses, current and past, have been Tamron-designed and Tamron-manufactured lenses that are/were rebadged as being Pentax lenses. I'm not even suggesting Tamron go off on its own and resume making their own branded lenses for Pentax, I'm suggesting that Pentax rebadge newer Tamron lenses (and regrettably yes, charge more for them.) It's not an ideal situation but provides some options to Pentax owners and brings newer technology to Pentax than the company can bring on its own. While some of us might not buy a 16-300mm, Pentax is already selling the older 18-270mm design.
Forum: Pentax News and Rumors 09-03-2017, 01:52 PM  
Any more news on the new Tamron 16-300?
Posted By tibbitts
Replies: 91
Views: 19,190
It's correct that many of us are probably here and perhaps started with Pentax digital because of value for the money. However if you look at the situation when many of us started with digital, say the mid-2000s, I don't think it was obvious how things like Pentax AF or (to bring up more sore points with some users) video or flash technology would evolve vs. the competition.

Some of us have become somewhat discouraged by the deterioration in the availability of 3rd party lenses. maybe partly because that does impact the value proposition, and partly because we get stuck with older technology or no product available at all in certain categories. Since Tamron has done other OEM lenses for Pentax I think having the new Tamron zooms available as Pentax models, albeit at a higher price, isn't an unreasonable request. I don't think it would be that huge a task for Pentax to replace the 18-270 with what is basically an improved alternative, and then make the 18-400 available. I don't see the disadvantage to Tamron or Pentax to doing that. In fact I don't see why Pentax shouldn't offer nearly every Tamron , at least that doesn't directly compete with a native Pentax lens. Yes, some of us would still gripe, but more people might choose (or not jump ship from) Pentax if one obstacle (perceived or otherwise) was partially removed, especially if we still find good value in bodies. And Pentax would surely benefit from a larger ecosystem.
Forum: Pentax Camera and Field Accessories 09-03-2017, 07:30 AM  
What filter system for da 12-24
Posted By tibbitts
Replies: 12
Views: 946
A single-slot cokin P vignettes on that lens? That's surprising to me. It doesn't on my 77mm lenses, including the 10-20mm (old) Sigma at 10mm.
Forum: Pentax News and Rumors 09-02-2017, 01:06 PM  
Any more news on the new Tamron 16-300?
Posted By tibbitts
Replies: 91
Views: 19,190
Well, I would say some people might consider buying a 16-something who wouldn't consider buying an 18-something. That's a huge difference - it's why I bought a 24/2.8 to go along with a 28-55 for 35mm, so I did actually buy something to demonstrate the difference mattered to me. I actually chose my first Pentax dslr because of the 16-45mm being 16 on the wide side for a lower price than the competition offered.

I'll agree that I don't see 270 vs. 300 being an issue.

But really the 60-250 is a completely different animal due to its relatively immense size/weight so I don't think that's a fair comparison. Everybody has to draw the line somewhere. In your example, if suddenly some opportunity had appeared closer than the 60-250 could accommodate, you would have missed it entirely. Or to go to the opposite extreme, with an animal like you mentioned, especially a moving one, you'd have a higher probability of success with some camera other than a Pentax, but I think if you missed focus a little - or couldn't blur the background the way someone with a 400/2.8 could - I'm not sure you'd feel "burned" because you had a "mere" Pentax.
Forum: Pentax News and Rumors 08-26-2017, 06:12 PM  
K-3ii marked as discontinued
Posted By tibbitts
Replies: 660
Views: 66,076
I'm curious: what's everyone's plan if there is no follow-on to the current K3 this year? Or next year? How long would everyone wait before concluding that there will likely be no follow-on?
Forum: Pentax Camera and Field Accessories 08-19-2017, 02:14 PM  
Replacement Neck Strap (for lug attachment)?
Posted By tibbitts
Replies: 17
Views: 961
Honestly I was okay with the K5 original strap and had never really thought about it (well, that 60-250 did make me think about it sometimes) but the lining (underside) deteriorated and began rubbing off on my clothes - leaving what looked like rubber treadmarks.

However I would never use anything as a shoulder strap alone - too easy for it to slip off. I do wrap the strap around my wrist sometimes, but not the entire strap, so this strap would work for that as well.
Forum: Pentax Camera and Field Accessories 08-19-2017, 11:55 AM  
Replacement Neck Strap (for lug attachment)?
Posted By tibbitts
Replies: 17
Views: 961
I decided to try an OpTech Super Classic and so far it seems like a good compromise in terms of size - larger than the OEM but not as large a pad as some other straps. I haven't used it for an hour-plus yet, at which point the OEM strap would become uncomfortable, but it seems likely to be an improvement in comfort.
Thanks again for all the suggestions.
Forum: Photo Critique 08-19-2017, 11:30 AM  
People Senior Pictures
Posted By tibbitts
Replies: 8
Views: 781
Those are excellent photos! Did you use supplemental lighting or reflectors, and if so what devices on which images?
Forum: Pentax SLR Lens Discussion 08-17-2017, 06:02 PM  
Focusing problems with Tamron 17-50/2.8
Posted By tibbitts
Replies: 12
Views: 484
My 17-50 has been calibrated twice by Tamron and both times came back as it began life at -10. I do think it's a deficiency that Pentax (the models I have at least) only have a range of +/-10 instead of at least 20. At one point I had one Pentax lens needing +10 and one -10 so I couldn't even use debug mode to shift the scale if I'd wanted to.

Performance at f2.8 is uninspiring, and not uniform from side-to-side on my copy. The focus field is definitely not flat and that does come into play at wider apertures with a variety of subjects.

I will say that Pentax fixed my +10 lens in one try and made it focus correct at 0 without having me send in the camera body. Possibly Tamron could have done better with one of my camera bodies, but all three bodies agree so I really think it's the lens design (or the body they use for calibration) that's the problem.
Forum: Pentax Camera and Field Accessories 08-13-2017, 10:24 AM  
Replacement Neck Strap (for lug attachment)?
Posted By tibbitts
Replies: 17
Views: 961
Thanks for all the replies so far. It looks like everybody has found straps better than the OEM and that I should have replaced mine long ago.

It looks like the Optech and Domke are both pretty popular. The Optechs have so many similar-yet-different models that it seems difficult to choose between them, but it seems like people feel they're very comfortable. The swivel on the Domke would seem to be useful.

For those who haven't replaced the OEM strap yet, I might mention that eventually the strap will deteriorate and start marking your clothes with rubber-ish material that is very difficult to remove. That might happen with other straps too if they have some sort of anti-slip material.
Forum: Pentax Camera and Field Accessories 08-12-2017, 07:50 PM  
Replacement Neck Strap (for lug attachment)?
Posted By tibbitts
Replies: 17
Views: 961
My original K5 strap has failed so I'm looking for a replacement. My tripod plate won't allow using an eye bolt, so I need to attach to the original lugs. Suggestions would be appreciated.
Forum: Pentax Camera and Field Accessories 06-11-2017, 08:05 PM  
ND Graduated Filter
Posted By tibbitts
Replies: 13
Views: 795
Actually I haven't, but what should I expect to find? I guess the problem is that if they're not the same, then that doesn't really help because in the field all you have is the histogram to go by, so even if you can recover some data outside the histogram, you don't have a way to know how far outside the histogram your image might be, correct?
Forum: Pentax Camera and Field Accessories 06-10-2017, 07:19 AM  
ND Graduated Filter
Posted By tibbitts
Replies: 13
Views: 795
I'm not sure how accurate the histogram displays on the bodies are, but at least if you believe them, even with 2-3 stop grad NDs you routinely run out of dynamic range on up through K5 bodies, which are the only ones I have experience with. I do hope that someday the sensors can record much more dynamic range and make grad filters obsolete, because they're obviously of limited effectiveness.
Forum: Pentax Camera and Field Accessories 06-04-2017, 07:57 AM  
Graduated ND Filters and Breakthrough ND
Posted By tibbitts
Replies: 13
Views: 1,198
I only use mostly Cokin filters and yes there seems to be a cast sometimes, but I guess I don't find it that objectionable.

Having said that with digital, discounting issues of color cast, there is not as much an issue of 2 vs. 3 stop as there was with film: you would probably chose 3, since the only objective is to get the entire scene within the sensor's dynamic range, and you can fix excessive correction more easily than with film. Sometimes even 3 stops come up short for sunrises/sunsets.
Forum: Pentax SLR Lens Discussion 05-31-2017, 07:18 PM  
Why Are Third Party Lens Manufactures Dropping Pentax?
Posted By tibbitts
Replies: 59
Views: 3,561
The last I knew (I haven't checked lately), nobody has even been able to successfully convert a Pentax 60-250 to screw drive. That's maybe 2% of the task of completely adapting a foreign lens to work on every Pentax body. If you mean to disregard AF, I think you're also throwing out at least 80-90% of the potential market for most lenses.
Forum: Pentax Camera and Field Accessories 05-12-2017, 04:36 PM  
seemingly trivial Pentax LI90 battery question
Posted By tibbitts
Replies: 6
Views: 927
The batteries are very equally worn. I don't know how to decode the date if that's what it is: example SBCC. One is a K5 generation, other is K5ii.
Forum: Pentax Camera and Field Accessories 05-12-2017, 03:58 PM  
seemingly trivial Pentax LI90 battery question
Posted By tibbitts
Replies: 6
Views: 927
Given two LI90 Pentax-brand OEM batteries, will the one with the higher number (printed in the silver box on the label) be the newer or older battery? There are several years difference in my batteries, but I don't know which is which. Or is it not possible to know (now)? Thanks.
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