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Forum: Pentax SLR Lens Discussion 2 Days Ago  
Justification for the Pentax 20-40 Limited, compared to 18 50 HD
Posted By bdery
Replies: 29
Views: 1,039
I'm late to the show, but here goes...

I have not tested extensively but I have tested the HD 18-50 (and the SMC basic version). The HD 18-50 is an impressive lens. Its sharpness, bokeh and contrast impressed me a lot. It should not be considered a "kit" lens, it's more expensive than that and also much better than that. I'm not surprised that you like it a lot.
Forum: Pentax SLR Lens Discussion 2 Days Ago  
Further Vivitar 120-600mm test : the Moon
Posted By bdery
Replies: 5
Views: 490
It was at F11, I wanted to see if it was significantly sharper than F8.

The settings you propose would have required heavy adjustments in post-processing, bringing up the equivalent ISO/gain to more than what I used. There was not enough light to use 1/200. I agree that it would have yielded a sharper picture still.

I'll keep looking at the Moon and try to take advantage of its brightening in the following two weeks.
Forum: Pentax SLR Lens Discussion 2 Days Ago  
Further Vivitar 120-600mm test : the Moon
Posted By bdery
Replies: 5
Views: 490
Here's a quick and dirty test shot of the Moon with the Vivitar 120-600. Shot with the K-3, on a cheap tripod (not good enough, I think). ISO 1000, 1/25 seconds, 10 seconds timer. Focus at fully at infinity, but it almost seemed like the lens would have benefited from some more leeway in this regard.

Shot in RAW, processed in Lightroom (fixed CA, added clarity, cropped).

Click on the image for a full size version. Enjoy!

Forum: Pentax SLR Lens Discussion 3 Days Ago  
Lens recommendation request - fast autofocus, sharp 50mm-ish prime lens
Posted By bdery
Replies: 18
Views: 716
Certainly the best choices would be the DA 50 F1.8 if you want cheap, or the FA 43 Limited if you want magical.

I find that both on APS-C and on FF, 40-43 is a more natural focal length than 50, by the way.
Forum: Photo Critique 3 Days Ago  
People Schoolgirl
Posted By bdery
Replies: 5
Views: 344
I agree that the black outfit is not the most effective, however it works well on its own.

My first reaction was "wow this is cool!" And well executed.

I like the pose of the second one better too, however if the intent is to integrate the schoolgirl concept then the first one emphasizes the clothing better. The second one doesn't bear such a strong relationship with your chosen theme.

On the first one, I like the more traditional female pose with the completely unrelated environment.
Forum: Pentax SLR Lens Discussion 4 Days Ago  
Lens for family visiting: 18-250, 18-135, 17-50?
Posted By bdery
Replies: 10
Views: 421
Most important question first :P

Others have replied in part, but here goes. Pixie dust is found mostly in the Fa Limited, to a lesser extent in the Da Limited, and rarely in other lenses. If you open one such lens you will find this dust getting out and softly floating in the air.

What it does is close to magic (hence, pixie)...

Seriously, it refers to lenses with unique, often non-traditional but appealing rendering. Case in point, the FA Limited are sharp but not THE sharpest. They have good but not the best control over aberrations. Etc etc. And yet their images have an appeal that's almost universally acclaimed.



If it was me, I'd bring the 18-135 and the 40/70. That way you'll have a reliable lens for most situations, and a hit combo for low-light and more creative occasions.
Forum: Pentax DSLR Discussion 4 Days Ago  
Dpreview admitted they screwed up the K1ii review...
Posted By bdery
Replies: 25
Views: 2,074
Correct.



Correct. And a very relevant analogy.



If there are good people there, they should speak up, set things right, or leave.

Let's be honest. DPreview is probably the best-known source of photography information on the web. They have a unique position. And they take advantage of that position to push the brands they like (or get paid to like), criticize unfairly brands they don't like, ignore what could cast a shadow on the brands they like (remember the K-3 review fiasco?).

The least we could expect is some sort of objectivity, rigorous testing, and giving credit where credit is due. As it is, they sound like Apple fanboys claiming "you totally invented that!"

As a reviewer (and optical designer regularly designing and performing equipment tests) I feel insulted that they get so much credit for doing such a crappy job.
Forum: Pentax News and Rumors 4 Days Ago  
Is that a new tele lens?
Posted By bdery
Replies: 114
Views: 19,025
Having tested the PLM 55-300, as well as the 150-450 (and 70-200, 24-70, 15-30) the PLM is the fastest. Not always by much but REALLY fast.

However, as the technology stands it can only be used in small, light lenses.

The 70-200 and 150-450 are close in most cases, though.
Forum: Pentax Camera and Field Accessories 5 Days Ago  
Tripod as a Lightstand?
Posted By bdery
Replies: 15
Views: 626
Double post, don't know the reason. Disregard.
Forum: Pentax Camera and Field Accessories 5 Days Ago  
Tripod as a Lightstand?
Posted By bdery
Replies: 15
Views: 626
I use a tripod as a light stand regularly. I bought one of those cheapo umbrella holders from China and screwed it on a QR plate.

One of the things a light stand does better is get much higher. Another is that it's easier to put a lot of weight on them, closer to the ground, to keep them steady. But at the end of the day, both are just legs and a mast.
Forum: Pentax News and Rumors 5 Days Ago  
Is that a new tele lens?
Posted By bdery
Replies: 114
Views: 19,025
It seems in your list you only miss the 150-450. And THAT lens might you revisit your opinion of Pentax AF (well, that and the 70-200, 24-70, 55-300 PLM and even 15-30 but those do not offer the reach you are looking for).
Forum: General Talk 5 Days Ago  
Your latest de-acquisition
Posted By bdery
Replies: 174
Views: 9,703
I love that lens so much (especially now that it's converted to FF) I wouldn't want to see it into any home but mine!
Forum: General Talk 5 Days Ago  
Your latest de-acquisition
Posted By bdery
Replies: 174
Views: 9,703
I love that lens so much (especially now that it's converted to FF) I wouldn't want to see it into any home but mine!
Forum: Pentax Camera and Field Accessories 6 Days Ago  
Belt pouch for FA Limited Lenses?
Posted By bdery
Replies: 13
Views: 617
The Mindshift gear cases (the Nest, indeed, is a good choice), the Thinktank lens cases that go with their modular system or the Peak Design Range Pouch or Field pouch would be my favourite choices. The Field holds the lenses side by side, but is clumsier to attach to a belt (the sleeve does not have velcro). The Range allows you to stack the lenses, either by using a dual lens cap or by separating them using the built-in flap.

With either, as with the Mindshift/Think Tank products, you can transform them into a compact shoulder bag by using an external strap (any strap with Think Tank/Mindshift, their own Slide with Peak Design).
Forum: Pentax SLR Lens Discussion 05-10-2018, 05:30 AM  
First tests with the Vivitar 120-600mm F5.6-F8
Posted By bdery
Replies: 2
Views: 501
I don't think so. By "modified" I mean that I used Lightroom to remove some PF, by clicking on the purple fringe. I could have tried a more advanced editing by trying to remove all CA (there is a green fringe visible) but that wasn't the point here. I also added some clarity.



It's supposed to have been made by Kobori, so without knowing anything about the lens you mention, I'd guess yes ;)
Forum: Troubleshooting and Beginner Help 05-09-2018, 11:55 AM  
Does Lomography Daguerreotype Achromat 64mm F2.9 Art lenses suites new Pentax k-1II
Posted By bdery
Replies: 7
Views: 442
Indeed it does work. Set the camera to manual focus and M mode, insert the blade you want, press the green button to measure exposure and focus as well as you can, then fire away!
Forum: Pentax SLR Lens Discussion 05-08-2018, 08:08 AM  
First tests with the Vivitar 120-600mm F5.6-F8
Posted By bdery
Replies: 2
Views: 501
Over the weekend I started playing with my "new" Vivitar 120-600mm F5.6-F8.

Conditions were windy and I don't have a tripod made especially for heavy lenses (Sirui T-025X) so results might not be as good as I'd wish. Still, the lens delivers pretty good results.

Since I already have a Pentax 60-250 F4 (a vastly superior lens) my main interest is at the tele end, near 600mm. I mostly tested there.

First comment, purple fringing is strong with this lens, as is to be expected. Luckily, it's also easy to correct via post-processing.

Second, the focus ring is superb, very smooth, easy to operate and precise.

Third, using ES and 10 second timer help to prevent vibrations, but I'm not convinced that it wouldn't be better to use SR instead. I'll have to try.

It's possible to click images to see full-res versions.

My first pair of samples shows the same image, the first being a JPEG straight out of camera, the second the same with PF removed, some clarity and vibrance added. Image shot at F8. Subject about 15 feet from camera (near the closest focus distance).

Unmodified



Modified


The second series looks to see if there's a significant drop in resolution as we zoom in, going from 250, to roughly 400, to 600. All at F8. Subject about 25 feet from camera. All images cropped to 100% magnification, which explains the different FOV.

250mm


400mm


600


The third compares (different composition, same distance) the same subject at F8 and F16. Subject about 30 feet from camera.

F8


F16


The last shows the detail that's possible to capture with a distant subject (about 200 feet, roughly). Shot at F8, and cropped to 100%.

Forum: General Talk 05-08-2018, 05:13 AM  
Your latest de-acquisition
Posted By bdery
Replies: 174
Views: 9,703
Well I just sold my recently-acquired Sigma 400mm F5.6 APO. Having acquired a Vivitar 120-600 there was no need for the other one.
Forum: Pentax K-1 05-08-2018, 05:11 AM  
K-1 stabilization vs Olympus e-m1 mark 1 stabilization: is Oly really that good?
Posted By bdery
Replies: 65
Views: 2,048
I'm sure it's possible.

I'm sure it can happen more than once.

But to claim it consistently does so? As in, most of the time? Nope. The human body is not as stable as that, even highly trained snipers need something to brace on ;)



I'm sure the Oly camera is excellent, and that their IS is pretty good. But there's no magic involved. The human body is not made for being so still for such a long time, and the sensor/IS system simply do not have the room to compensate for such an amplitude of movement.

The key here is "consistently". I've captured handheld images at around a second with my K-3 and K-1. It can be done. But often, reliably? No way Jose.
Forum: Pentax K-1 05-07-2018, 09:51 AM  
K-1 stabilization vs Olympus e-m1 mark 1 stabilization: is Oly really that good?
Posted By bdery
Replies: 65
Views: 2,048
It's probably much, much more related to technique, lens, camera weight, body of the user, how the person was braced, distance to subject, etc.

2 seconds without ANY help might be possible, but it would require

1-many trials )i.e. it's not an average image, to be sure)
2-luck
3-a wide focal length
4-a user with excellent technique, controlled breathing
5-maybe something against which to lean

The person might have cheated or not, however if that person claims that Oly delivers 2 seconds handheld exposures consistently, regardless of the conditions, then that person is lying. The amount of movement involved in holding still for two seconds prevents any company from making that claim.
Forum: Sold Items 05-07-2018, 05:09 AM  
For Sale - Sold: Sigma APO 400mm F5.6 (cheap but read carefully)
Posted By bdery
Replies: 3
Views: 633
Sold pending payment.
Forum: Sold Items 05-07-2018, 05:09 AM  
For Sale - Sold: Sigma APO 400mm F5.6 (cheap but read carefully)
Posted By bdery
Replies: 3
Views: 633
Sold pending payment.
Forum: Sold Items 05-05-2018, 05:12 AM  
For Sale - Sold: Sigma APO 400mm F5.6 (cheap but read carefully)
Posted By bdery
Replies: 3
Views: 633
PentaxForums.com Marketplace Listing

Item for Sale
Sigma APO 400mm F5.6 (cheap but read carefully)

Asking Price
110.00 USD

Item Location
Québec (Canada)

Item Description
I'm selling this Sigma APO 400mm F5.6 lens.

It's a fast tele with manual focus but fully automatic aperture control. It also has a focus ring.

The lens is short and light, features a rotating tripod foot and a built-in hood.

This lens comes with the original caps and the original leather hard case in superb, almost new condition.

The lens barrel has some scuffing on the rubbery plastic parts but nothing serious.

Important : the lens performs superbly optically. BUT it appears to have two flaws. The first is something long and thin near the front element, if it was on the outside I'd say it's a minuscule string or hair. It doesn't show when taking pictures. The second is on what I think is the 5 or 6th optical element: there's a spot of what is possibly optical cement showing. It's not big but visible in the right light and orientation. Again, I can't see it in pictures. Just know it's there. A willing tinkerer could probably fix all of this prett easily, I guess. Regular users coul live with it and get a great deal on a great lens. I was not able to photograph those flaws so I'm making sure to write about them.

I have not used the lens much but now that I've acquired a Vivitar 120-600mm, this Sigma is redundant so I'm letting it go.

The Sigma is surprisingly light and small for what it offers, and from my humble testing it's admirably sharp. It's easy to handhold thanks for the light weight, and is not much bitter than a 60-260mm F4. It has internal focusing and communicates the aperture flawlessly with the camera.

Here are some pictures!









Here is the case. Showing is a small 3D printed jig I tried to have made to remove the front element and try to repair it. That didn't work well and I did not try anything further, but if you're interested I'll send the jig along.



Willing to entertain offers, but I think the asking price is fair at about half the usual market value.

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

Are you selling or trading this item?
Selling

Item Condition (Key)
Used
Fair

Shipping Destinations
Worldwide

Shipping Charge
Varies

Shipping Services
Cannada Post prefered

Accepted Payment Types
PayPal

Return Policy & Additional Details
No returns

Please send me a private message if interested in the item!
Forum: General Talk 05-05-2018, 04:54 AM  
Your latest acquisition
Posted By bdery
Replies: 12,568
Views: 855,625
That's impressive. Is it any good?
Forum: Photographic Equipment for Sale 05-05-2018, 04:52 AM  
For Sale: Kenko Skylight (iA) filter 82mm
Posted By bdery
Replies: 0
Views: 183
PentaxForums.com Marketplace Listing

Item for Sale
Kenko Skylight (iA) filter 82mm

Asking Price
25.00 USD

Item Location
Québec (Canada)

Item Description
I'm selling this Kenko Slykight filter (1A tint) with a 82mm filter size. There is slight brassing near the Kenko name but apart from that the filter is like new. The glass is perfect.

Shipping will be at cost and should not be expensive.

Let me know if you're interested!

[IMG][/IMG]

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
Worldwide

Shipping Charge
To be determined

Shipping Services
Canada post prefered

Accepted Payment Types
PayPal

Return Policy & Additional Details
No returns

Please send me a private message if interested in the item!
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