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Forum: Photographic Equipment for Sale 06-07-2019, 06:52 AM  
For Sale: FA 77ltd, DA 35ltd, DA 15ltd, Cosina 55 f/1.2, Dine 100 macro, FA 50 1.7, K20D+grip
Posted By jsherman999
Replies: 19
Views: 3,898
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Two lenses in the mail, 6 more to send today or sat.

Still available: K20D + grip, FA 50 1.7. I'll add an M135 f3.5 and sell those three as a kit for $200!

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Forum: Photographic Equipment for Sale 06-05-2019, 06:26 AM  
For Sale: FA 77ltd, DA 35ltd, DA 15ltd, Cosina 55 f/1.2, Dine 100 macro, FA 50 1.7, K20D+grip
Posted By jsherman999
Replies: 19
Views: 3,898
.

K20D + grip + bag and FA 50 1.7 left! Buy as a gift kit to get some youngster into real photography!




[COLOR="Silver"]

---------- Post added 06-06-19 at 07:55 AM ----------

FYI I hope to get the paid-for items in the mail today (thu)
Forum: Photographic Equipment for Sale 06-04-2019, 09:01 AM  
For Sale: FA 77ltd, DA 35ltd, DA 15ltd, Cosina 55 f/1.2, Dine 100 macro, FA 50 1.7, K20D+grip
Posted By jsherman999
Replies: 19
Views: 3,898
:) It controls my mind as you know, and tells me it wants to go to someone who will use it more than I have in the last 5 years :)

Truth is I'm shooting so much less these days, life is too busy. I may take up the hobby again with gusto when my boys are a bit older, work calms down, family needs stabilize, etc.

To all - I'll get back to you with shipping cost, we'll do paypal and you should have your item shipped prob by tomorrow.

35 LTD and K20D still available.
Forum: Photographic Equipment for Sale 06-03-2019, 07:20 AM  
For Sale: FA 77ltd, DA 35ltd, DA 15ltd, Cosina 55 f/1.2, Dine 100 macro, FA 50 1.7, K20D+grip
Posted By jsherman999
Replies: 19
Views: 3,898
PentaxForums.com Marketplace Listing

Item for Sale
FA 77ltd, DA 35 macro ltd, DA 15ltd, Cosina 55 f/1.2, Lester Dine 100 macro, K20D

Asking Price
200.00 USD

Item Location
Minnesota (United States)

Item Description
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Photos of equipment to follow, along with samples from equipment. Descriptions and prices below to start with:


Pentax FA 77mm Limited: $400 (sold)

Near mint condition, excellent focus, includes leather pouch. If you own Pentax you should own this classic, beautiful optic.

Pentax DA 15mm Limited: $225 (sold)

Near mint condition, includes leather pouch. I created the "the Da 15 limited controls my mind" thread in this forum with this lens. It's tiny, sharp, brilliant color and original starburst ability. If you shoot a cropped Pentax body this gives you a wide-angle option with almost no extra weight/space in your bag, and one of the best WA options you have in this or any mount.

Pentax DA 35mm Macro Limited: $200 (sold)

Near mint, some folks like Mike Johnston (online photographer) thinks this is the best-rendering lens for Pentax mount. Comes with leather pouch.

I addition to full macro, it's a great walkabout d-normal, incredible contrast color and sharpness - Check my threads in his forum with the DA 35ltd : Steampunk Dreams... - PentaxForums.com


Cosina 55mm f/1.2: $175 (sold)

A f1.2 lens, Cosina-made, almost mint. Rare and getting more rare every year. Perfect optics, heavy, smooth manual focus throw, and can create OOF bokeh affects unlike anything I've ever shot.

Lester Dine 100 f/2.8 macro: $100 (sold)

The original dentist-office macro, unused when I bought it, still near-mint, nice looking lens. Incredibly sharp, super smooth manual focus, this is another classic lens that's hard to find now. Can be used as a top-tier street or portrait lens as well.

Pentax M 85mm f/2: $100 (sold)

A small, heavy, near-perfect optic in sharpness and bokeh. I have always loved the way this lens renders - basically like a 77ltd, but as a manual-focus M. Another rare optic. This is in excellent condition.

Pentax FA 50 f/1.7: $100

The original FA 50 1.7, a superior 50 that was sharper, better than the Canon or Nikon equivalents (I know, I shot all three at the same time :) )
If you want a solidly built Pentax FA classic normal for FF or aps-c, this.

Pentax K20D with used-once grip: $100

In great condition. If you need a 2nd body or want to get someone you know into 'real' (ie not phone :) photography, this is your body. I'll include a basically new grip, extra battery, small side bag to hold it, charger, manual.


Paypal only, you pay paypal fees + shipping.











.

Are you the original owner of the item being sold?
Yes

Are you selling or trading this item?
Selling

Item Condition (Key)
Used
Excellent

Shipping Destinations
Worldwide

Shipping Charge
5-15

Shipping Services
usps, UPS

Accepted Payment Types
PayPal

Return Policy & Additional Details
Will consider returns, but note that all descriptions are accurate - I've been selling in his forum since 2008 and only ship good stuff :)

Please send me a private message if interested in the item!
Forum: Pentax DSLR Discussion 01-17-2019, 04:06 PM  
Leaving Pentax
Posted By jsherman999
Replies: 71
Views: 5,789
The main issue with Pentax AF is focus lock - doesn't happen in time consistently, with moving subjects, especially in low light. This is what Nikon is known for, and you can usually detect the difference even with lower-end Nikons.

To me, this has always been Pentax's biggest failing. Fix that - somehow - and you are a niche brand-with-a-bullet that can survive on IQ and charm.
Forum: Pentax DSLR Discussion 01-17-2019, 03:49 PM  
Leaving Pentax
Posted By jsherman999
Replies: 71
Views: 5,789
You write:

"... I love my 77--it's my favorite lens--but it doesn't have the resolving power of the lenses my peers are using and in a semi-competitive environment, falling behind is not terribly fun."

I'm wondering what photographic application would expose the resolution difference between, say, a Nikon 85mm 1.4 (or whatever lens you were referring to) and the Pentax 77ltd?

In my experience, the 77ltd it exceptionally sharp. Copy variation?
Forum: Pentax K-5 10-18-2018, 05:05 PM  
What bothers me about Pentax and the new K5
Posted By jsherman999
Replies: 82
Views: 18,571
.

Any other old timers on this forum remember "wendyb"? Good times... ;)
Forum: Pentax Full Frame 08-29-2018, 10:22 AM  
are you happy with switching to FF?
Posted By jsherman999
Replies: 310
Views: 24,887
My situation is different, going directly from K20D to 12MP FF to 36MP FF in 2012. (Alas Nikon, since Pentax FF didn't exist in 2012)

There just are a lot of little circumstances where FF is better. One: I liked my 18-55 and especially SDM 16-50 f/2.8 for indoor use because it's FL range was perfect for a lot of indoor shots I wanted to take - but I sometimes thought f/2.8 was too slow for low light, so I'd move to my 50 f/1.8 or 77ltd, etc, giving up the fast FL change for better low light perf.

With FF, I can use an excellent Tamron 28-75 f/2.8, which gives me the exact APSC equivalent of an 18-50 f/1.8 zoom - giving me the FL range I wanted at the same time that I'm getting the low-light perf. If I want to go *very low light, I can put on a fast prime and get performance that can't even be matched with aps-c given any lens.

For my long telephoto shooting I don't see much of an advantage for FF besides the better/faster AF lock.

I will also say this: I spent a lot of money on camera equipment between 2007 and 2012 - since 2012 I've spent, IIRC, nothing. So you can say that I've been more satisfied with FF :) . To be honest though my focal length requirements were filled about the same time as my last camera purchase, so I didn't have to chase any lens gaps there.

.
Forum: Pentax Full Frame 06-03-2016, 01:14 PM  
Hey, isn't this 36 MP sensor supposed to out-resolve all legacy Pentax glass???
Posted By jsherman999
Replies: 84
Views: 10,200
I know, right? Everyone knows it's the Nike shoes that bring the game up to that level.
Forum: Pentax Full Frame 05-06-2016, 03:36 PM  
Tamron 28-75 and 70-200
Posted By jsherman999
Replies: 29
Views: 5,484
I use the Tamron 28-75 2.8 on 36MP D800 for all kinds of casual shooting, and it's great. There are bad copies out there, though.


Crop of above:


Forum: Pentax Full Frame 05-06-2016, 03:28 PM  
Pixel shift results from DPreview
Posted By jsherman999
Replies: 35
Views: 3,519
btnapa, you compared two different focal lengths from the same position, or moved back with the Tamron at 200 to preserve the framing? Neither is apples-apples.

I owned a perfect copy of the Tamron 70-200, and my 77 was sharper than the Tamron at 77mm through the entire shared aperture range (f/2.8+) I think I had a thread here where I compared my new tamron to a couple primes at those focal lengths, and the 77, M85 f/2, the Sigma 70 and another were sharper, but the Tamron beat all my Taks and other zooms.

I don't live in a world where an in-spec 77 is not 'good enough' for high-MP FF :)

It's going to resolve more and better than it ever has before, outside of maybe on the K3. Pixel peeping 36MP is going to show you things you never saw before, but you don't print or display 100% crops of test charts. The 77 (and 43, and 31) are great FF lenses even at 36MP, as long as they're not faulty and your AF is on-target.


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Forum: Pentax Full Frame 04-12-2016, 10:19 AM  
Does a larger sensor have effect on dynamic range?
Posted By jsherman999
Replies: 61
Views: 4,725
.

The short answer is, "Yes, a larger sensor will give you more Dynamic Range."

The main caveats being:

- If the sensors are of similar generation and technology (newer smaller sensors can beat older larger sensors)
- Assuming same exposure, framing, but not same DOF. (Meaning, same FOV and F-stop - don't compare different exposures and expect apples-apples)

It's not always true at base ISO - newest technology is often king there. As you move up the ISO scale, you see the effects of more total light in the image when taken at the same exposure, and the larger sensor shows it's advantage.

Bill Claff is an engineer who measures raw files from almost every body, calculates and then plots a measure called PDR (Photographic Dynamic Range) - he was doing that before DPR got in the game, but their screen tab graphs mostly mirror his findings.

Here we see the PDR of three cameras - MF 645Z (yummy), D800E and D7000. The D800e and D7000 have essentially the same sensor, one just larger:



Here's DPR's graph of DR for D800 vs D7000 - again, same pixel tech:



You can peruse Bill Claff's site or DPR (choose 'print tab' to see effects on whole image, not 'screen tab' which shows you 100% view) comparing different cameras of different generations - but what you'll find as a general rule is that with roughly same-gen cameras, you almost always see a DR advantage in the ISO range with larger sensors, even with varying pixel sizes. Very simply: Larger sensor = more total light gathered at the same exposure, which affects noise and DR.

What this means to you: The obvious. Say you have a K-1 low light shot at ISO 1600 - you would see noticeably more push-pull capability in that image than you would have with your K5 taken at the same FOV and exposure, recovering highlights a bit more, pulling more things from shadows before the image breaks down.

.
Forum: Pentax Full Frame 04-12-2016, 09:44 AM  
New to Pentax FF? Legacy Lenses kit recommandations.
Posted By jsherman999
Replies: 28
Views: 4,094
I'd really like to know how the FA 20 f/2.8 performs on the K-1, and the F/FA 50 1.7.
Forum: Pentax K-1 04-02-2016, 10:03 PM  
Will autofocus work between K-1 and my Sigma 70-200mm f/2.8 EX DG HSM II Macro?
Posted By jsherman999
Replies: 29
Views: 4,931
You can expect that every lens that will AF on a K20D/K7/K50/K5/K3/K-whatever will AF on a K1.

If there's a FW-related bug with a particular K-mount lens it will be addressed.

The Sigma 70-200 f/2.8 and Tamron 70-200 f/2.8 will be smart and fun choices for the K1.
Forum: Pentax K-1 04-02-2016, 09:31 PM  
K-1 Post Traumatic Stress Syndrome
Posted By jsherman999
Replies: 88
Views: 7,154
...."Out For Delivery" nulls all the overworked registers in the brain and brings renewal.
Forum: Pentax K-1 04-02-2016, 09:23 PM  
The K1 will it breathe new life into focal lengths that have not been as popular?
Posted By jsherman999
Replies: 44
Views: 4,064
I like hearing this, because growing up, a 35mm camera and lens kit wasn't a trivial purchase among my family or even in my greater community - you were either 'rich' or an obsessive hobbyist if you had a 35mm camera. Being a participant in a forum of enthusiasts for the past 9 years has made question my own experience at times... like maybe I had it wrong. It's nice to see people who have a shared appreciation for the relative rarity of our hobby, and a big reason for that rarity is cost, if we're being honest.



Yes. Or to put it another way, it will allow a new avenue of appreciation that's really a walk down an old avenue.

.
Forum: Pentax Full Frame 04-01-2016, 01:11 PM  
f-stop/aperture differences APS-C vs. Fullframe
Posted By jsherman999
Replies: 83
Views: 7,466
But again, the chef or the Indy car driver doesn't deny the underlying reasons why too much salt will ruin the dish, or too much FP of force will pull him into the wall - they just apply knowledge gained from experience that maps to the underlying science. They don't actively deny that science exists, they just use they're own ad-hoc interpretation of it.

(BTW the composer example does not apply - there is no underlying mathematical and physical rule that describes in more detail what he/she does - a musical composition is purely art, purely subjective. I suppose one could come up with a mathematical formula that describes a cadence and chord change that would be most pleasing to most people based on a lot of data and surveys, but IMO music will always just elude an underlying quantitative order. Maybe. I hope. We'll see how they re-task the OK-Go cluster.)

Equivalence is actually very practical and probably makes itself most useful in the planning/buying stage - it allows you to set expectations about how buying anything might help or hurt you. It helps you figure out if someone is trying to sell you a bunch of BS. That's it. After the purchase, you're free to add your pinch of salt, and if you chose wisely, you'll find that you're a happier, less frustrated chef.
Forum: Pentax Full Frame 03-30-2016, 09:33 AM  
New glass - old glass. Which lenses should Pentax revisit?
Posted By jsherman999
Replies: 204
Views: 20,895
Yes, although they should be able to make a smallish, not-too-expensive (< $750) FA 20mm f/2.8, which would be a thrill to use on FF.

Re the K-mount 50 f/1.2 conundrum:



($200 and sweet :) )


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Forum: Pentax Full Frame 03-27-2016, 06:19 AM  
New glass - old glass. Which lenses should Pentax revisit?
Posted By jsherman999
Replies: 204
Views: 20,895
I'm continually hitting refresh on Amazon Prime until I see these ^ appear.
Forum: Pentax Full Frame 03-26-2016, 07:18 AM  
New glass - old glass. Which lenses should Pentax revisit?
Posted By jsherman999
Replies: 204
Views: 20,895
Whatever they do, they need to make sure their QA is as good as can possibly be. Moving from the MIJ FA Limiteds to the MIV ones resulted in several reviews (and many shooters) noticing a lack of sharpness, de-centering, etc.

There's no reason why the new manufacturing facilities and processes can't be brought up to snuff.
Forum: Pentax Full Frame 03-22-2016, 04:22 PM  
f-stop/aperture differences APS-C vs. Fullframe
Posted By jsherman999
Replies: 83
Views: 7,466
How do you just know how each performs? Underneath your 'just knowing' is an ad-hoc application of equivalence, gained from (likely) experience.

I think the difference is that you prefer to leave it as vague an estimate as possible, which is fine, but it doesn't make the definitions under it all 'meaningless', it just makes them unimportant to you.

As far as shooting goes, I rarely apply equivalence either, for what I do. If you're hitting a perf limit though and you're wondering if lens X on camera Y might give you better results for shooting situation Z, you'd be better off applying it more precisely before you buy. Or, not. Equations generally don't care if they're used. :)

Alan Oleson summed it up nicely on dp:

"We have just found a simple and practical tool to explain most of the differences which others seem to think are unexplainable and just some weird thing you have to accept when changing formats."


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Forum: Pentax Full Frame 03-22-2016, 01:03 PM  
K-1 So What Is Full Frame Going To Provide Over A Crop Frame DSLR
Posted By jsherman999
Replies: 312
Views: 22,336
Bring it back I sez! ;)
Forum: Pentax Full Frame 03-22-2016, 11:40 AM  
Are the extra dollars worth the upgrade to the full frame sensor?
Posted By jsherman999
Replies: 54
Views: 4,711
In probably most ways that matter to photographers, it's an 'upgrade', in that it provides all the shooting options you had with the smaller format and some new ones the smaller format doesn't provide. **

It provides the potential for less noise, more DR, more DOF control in the majority of shooting situations. How much of an upgrade it is depends entirely on the photographer and her use cases.

For a lot of people, the level of 'upgrade' it provides for their shooting scenarios isn't worth the cost. Knowing how to apply equivalence helps you figure that out - helps you manage expectations before you lay down the $$. There's a good example of this with a PF member I can provide.

** and this is without taking the 'upgrades' that the manufacturer may put in the top-line body, like better AF module, bigger VF, other options that go into the flagship.
Forum: Pentax Full Frame 03-22-2016, 08:13 AM  
f-stop/aperture differences APS-C vs. Fullframe
Posted By jsherman999
Replies: 83
Views: 7,466
Yes, but keep in mind how this would map to real-world shooting - you will rarely (outside of non-stacking macro) ever find yourself in a situation where you just can't stop down any more, that the smaller format allows you greater DOF that the larger format just can't physically match - because often when you're getting into those situations, hyperfocal has already kicked in and any 'greater DOF' the smaller format would give you is just theoretical.

What typically happens is this: You feel the need to get more DOF with the larger format, so you have the option of stopping down to match the DOF (and noise/DR) of the smaller format. Done. Same DOF for both.

Or:

You would like less DOF to diffuse the junk in the background more, or to make your lovely subject 'pop' out of the frame more - but the smaller-format lens is already wide-open. Larger format gives you the option of getting that extra stop less DOF as long as you have a lens that has the same FOV and max f-stop.

Divorce the argument from aps-c vs. FF - imagine yourself shooting with the Q vs. the K5. With available lenses, with your typical subjects, which would give you the feel of more 'DOF control', the Q or the K5?

Now, apply that answer to K5 vs. K1.

.
Forum: Pentax Full Frame 03-22-2016, 07:59 AM  
f-stop/aperture differences APS-C vs. Fullframe
Posted By jsherman999
Replies: 83
Views: 7,466
^ Well put.

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