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Forum: Pentax SLR Lens Discussion 06-11-2017, 05:07 PM  
I just bought a CZJ Biometar 80mm f/2.8 (M42 fitting) - Anyone have experience of it?
Posted By ramuk
Replies: 7
Views: 1,050
It is a great lens. The chrome is the best among all the versions of the lens. It will render a swirly (not very extreme) bokeh wide open , which reduces as you stop down. I feel the images it produces have a very "film" look. Sharp in the center from.one stop down. Wide open it flatters the model with its little bit of softness and swirl. Renders skin tones beautifully. In short you'll love it, at least I do.

Happy shooting.
Forum: Sold Items 05-08-2017, 04:02 PM  
For Sale - Sold: Handyman Special - Pentax Spotmatic F with 5 lenses - Price Lowered!
Posted By ramuk
Replies: 9
Views: 2,255
I'll buy them. Pm coming your way.
Forum: Pentax K-1 05-08-2017, 03:58 PM  
Two Cheap Lenses That Are Great For Pixel Shift Shots
Posted By ramuk
Replies: 8
Views: 1,632
Both these lenses are great value even without taking pixel shift to consideration.

What did you see in the pixel-shift images that makes them stand out? Asking since I don't have a k1 (as yet).

Thanks.
Forum: Pentax SLR Lens Discussion 05-07-2017, 04:26 PM  
Why Are Third Party Lens Manufactures Dropping Pentax?
Posted By ramuk
Replies: 59
Views: 4,321
Some if my speculation/thoughts.

I wish Pentax would open up their technology for auto-focus to enable third party manufacturers to make lenses for Pentax.

I somehow think the heyday for Pentax was when they made m42 cameras and K Mount cameras (not km or ka). In that golden age, you had multiple 3rd party lens manufactures as well as camera makers. Both the basic K mount ams m42 were open enough to let this happen. It also helped that Pentax made truly great lenses.

As further food for thought take a look at Canon. Their autofocus lenses seem to be easy enough to reverse engineer that there are multiple manufacturers for autofocus adapters to Sony nex. I wonder if that's why they rule the roost.

That's all I have. I intend to buy the K1 by the end of summer continuing my participation in thePentax family all the way from 1990( that must seem like yesterday for some folks on the forum!). I hope that Pentax/Rioch thrives and continues to give me the joy I have had for so long.

Cheers. Happy shooting
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 03-20-2017, 12:46 PM  
Sony FE 50 1.8 vs Sony 55 Sonnar 1.8
Posted By ramuk
Replies: 11
Views: 865
I tried it for like 15mins. I tried it using a Zeiss Planar 1.4 (c/y mount) and Pentax K 85mm 1.8 lenses. I think the adapter works well for portraits. I am not sure about moving subjects, since the focus took some time (not too long though) to lock. I also think it works well for lenses that are light. Heavier lenses should pose problems since the adapter needs to move the entire lens. Similarly long-focus-throw lenses like a Vivitar 105mm 2.5 (or most macro lenses) may not be usable without some pre-focusing of the lens.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 03-20-2017, 11:54 AM  
Sony FE 50 1.8 vs Sony 55 Sonnar 1.8
Posted By ramuk
Replies: 11
Views: 865
Here is a whole lot of information on Techart PRO - Techart PRO FAQ - FM Forums.

Yes, you can mount m42 lenses (and most other lenses) and have autofocus. The way it works is, m42-lens -> m42-Leica-M-Adapter -->Techart-Pro --> Sony a7ii, i.e. you are stacking adapters. Since the adapters are glassless, most lenses should be see significant change in performance (lenses with floating elements may be affected).

Thanks.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 03-20-2017, 09:57 AM  
Sony FE 50 1.8 vs Sony 55 Sonnar 1.8
Posted By ramuk
Replies: 11
Views: 865
My personal opinion, buy neither. If you want auto-focus, why not try the Techart Pro auto-focus adapter. You can buy a whole lot of manual-focus lenses (like the planar 1.4 50mm or 80mm, Pentax K 55 1.8, 85mm so on) and the appropriate adapters. Now you have relatively less expensive lenses and auto-focus too.

Cheers.
Forum: Sold Items 03-13-2017, 06:14 AM  
For Sale - Sold: Tamron 24-135 - $125
Posted By ramuk
Replies: 4
Views: 1,036
A full frame zoom, which is very useful on APS-C. Reportedly out-performs the DA 18-135 (see here). I bought a copy of the lens from this forum for use on my K5; I liked it a lot (gave it up to shoot primes).

If you are looking for a walk-around zoom, or to shoot family holidays, and weather sealing is not crucial, grab this lens.
Forum: Sold Items 02-22-2017, 07:13 AM  
For Sale - Sold: Vivitar Series 1 105mm f2.5 VMC - 1:1 Macro P/K-A Lens
Posted By ramuk
Replies: 2
Views: 742
That is uncommon indeed, some enterprising dentist I guess. No takers for this excellent lens? Feel free to make me an offer.

Thanks.
Forum: Pentax SLR Lens Discussion 02-21-2017, 08:23 AM  
Help selecting the perfect lens for copying artwork with a K-1
Posted By ramuk
Replies: 30
Views: 2,749
Hi,

You can also consider the Pentax 35mm 2.8 macro, supposedly amongst the best macros Pentax ever produced.

Another interesting thought, is to try an enlarging lens. These are known for their flat field properties. They don't come with a focus-ring, but if the artwork and the camera are fixed, it may not be a problem. Most of the enlarging lens come with a M39 thread and should be mountable on the K1 using M39->m42 adapter.

All the best.
Forum: Sold Items 02-18-2017, 08:05 AM  
For Sale - Sold: Vivitar Series 1 105mm f2.5 VMC - 1:1 Macro P/K-A Lens
Posted By ramuk
Replies: 2
Views: 742
PentaxForums.com Marketplace Listing

Item for Sale
Vivitar Series 1 105mm f2.5 VMC - 1:1 Macro P/K-A Lens

Asking Price
275.00 USD

Item Location
Texas (United States)

Item Description
Very very sharp 1:1 macro lens. Has a somewhat of a legendary status, even by today's standards.The long focus throw is a pleasure to manually focus with.

This copy is optically and cosmetically very good. The aperture and focus work well.

The shipping price is for shipping within the USA. Shipping for other countries will be at cost (we can decide on the best way to ship).






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
12

Shipping Services
USPS

Accepted Payment Types
PayPal

Return Policy & Additional Details
Will accept returns if not as described and if notified within 5 days. Buyer pays shipping.

Please send me a private message if interested in the item!
Forum: Sold Items 11-25-2016, 08:36 AM  
For Sale - Sold: Vivitar Series 1 "Bokina" (tokina) 90mm F2.5 Macro with 1:1 Adapter
Posted By ramuk
Replies: 7
Views: 1,318
The crop sensor reduces the field-of-view. It should not impact the macro magnification. That's my understanding.

Cheers.
Forum: Pentax SLR Lens Discussion 11-14-2016, 08:59 AM  
Which Camera mount is this lens? Please help need to buy adapter.
Posted By ramuk
Replies: 5
Views: 732
I suspect it is a m42 Mount lens on which an adapter has been fitted. Not sure if it is a Pentax adapter, though that is my best guess.

Hope that is of some help.


Cheers.
Forum: Sold Items 11-10-2016, 07:20 AM  
For Sale - Sold: SMC Pentax -F 50mm 1.4
Posted By ramuk
Replies: 1
Views: 778
PentaxForums.com Marketplace Listing

Item for Sale
SMC Pentax -F 50mm 1.4

Item Location
Texas (United States)

Item Description
A not-so-easy to get full frame auto focus 50mm 1.4 lens. Similar qualities to the FA 50mm 1.4 lens. Great for portraits at 1.4. Sharp by 1.7.

The lens is very good shape optically and cosmetically. No scratches, haze or fungus on the lens. The auto-focus works well on my K5.



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

Are you selling or trading this item?
Selling

Item Condition (Key)
Used
Like New

Shipping Destinations
North America

Shipping Charge
15

Shipping Services
USPS

Accepted Payment Types
PayPal

Return Policy & Additional Details
Will accept returns if not as described and if notified within 5 days. Buyer pays shipping.

Please send me a private message if interested in the item!
Forum: Sold Items 11-06-2016, 04:42 PM  
For Sale - Sold: SMC Pentax-FA 24-90 3.5-4.5 IF & AL
Posted By ramuk
Replies: 1
Views: 827
PentaxForums.com Marketplace Listing

Item for Sale
SMC Pentax-FA 24-90 3.5-4.5 IF & AL



Item Location
Texas (United States)

Item Description
A lightweight walk-around zoom lens. The lens is in good condition. The auto-focus works fine. The glass is clear and the aperture is oil free. No major dings or scratches on the lens.

The lens has fair bit of following - Pentax FA 24-90 f3.5-4.5 | Lens Reviews | The Northcoast Photographer and SMC Pentax-FA 24-90mm F3.5-4.5 AL [IF] Reviews - FA Zoom Lenses - Pentax Lens Reviews & Lens Database.

Comes with lens caps.

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

Are you selling or trading this item?
Selling

Item Condition (Key)
Used
Good

Shipping Destinations
North America

Shipping Charge
15

Shipping Services
USPS

Accepted Payment Types
PayPal

Return Policy & Additional Details
Will accept returns if not as described and if notified within 5 days. Buyer pays shipping.

Please send me a private message if interested in the item!
Forum: Pentax SLR Lens Discussion 10-01-2016, 03:21 PM  
Choosing a portrait lens
Posted By ramuk
Replies: 19
Views: 1,938
If you are comfortable with manual focus I would suggest the tokina/vivitar series 1 90mm 2.5 or the Pentax 85mm 1.8. Either of these lenses could be had for ~300$. The tokina/vivitar I think is a better option than the Samyang especially since using a 1.4 on a full frame without focus peaking or evf will prove to be a challenge.

If auto focus is what you prefer I think the 77mm 1.8 is the best option.

My two cents as an amateur.

Thanks.
Forum: Troubleshooting and Beginner Help 09-30-2016, 09:20 AM  
Vivitar 135mm K-Mount
Posted By ramuk
Replies: 2
Views: 638
That does not look like a k mount. Suspect it is a Minolta MD mount. It will not mount on the K5.

Thanks.
Forum: Pentax K-1 09-18-2016, 02:58 PM  
SMC Pentax-M lenses
Posted By ramuk
Replies: 11
Views: 1,240
Hi,

From https://www.pentaxforums.com/forums/54-pentax-lens-articles/110657-how-use-me...-k-30-etc.html

Ensure that the "Using Aperture Ring" custom function is set to "2 (allowed)"
Forum: Welcomes and Introductions 08-17-2016, 01:22 PM  
Seeker of Knowledge (if the knowledge is actually useful - BONUS POINTS)
Posted By ramuk
Replies: 46
Views: 3,037
Both our thoughts are exactly the same and the conclusions we infer is the same. We differ in how we define pixel pitch. I used the definition available here: https://www.lensrentals.com/blog/2012/02/sensor-size-matters-part-2/ (look toward the bottom of the article under the section: Calculating the pixel size). As defined there, the pixel pitch is the distance between the center of adjacent pixels. Hence I concluded that since the K3 has more pixels for the same size of sensor, it has a lower pixel-pitch (i.e. distance between the pixels is smaller).

Looking at the review of the K3 Pentax K-3 Review - Detail and Noise | PentaxForums.com Reviews, the reviewer too seems to be using the same definition of pixel-pitch.

Anyways, all that is academic. What's important is the conclusion, which we agree on: Though the K3 has a lesser dynamic range, the higher resolution more that makes up for this, especially for landscape photography.

Happy shooting.
Forum: Welcomes and Introductions 08-17-2016, 09:02 AM  
Seeker of Knowledge (if the knowledge is actually useful - BONUS POINTS)
Posted By ramuk
Replies: 46
Views: 3,037
Agree with all the sentiments and suggestions here. One correction though, the K3 has a lower pixel pitch than the K5 series of camera. This results in the K5 having a better dynamic range than the K3. The K3 supposedly (i don't own one) more than compensates for this with its higher resolution.

That said when you are shooting landscape or wildlife (because you will need to crop), the higher resolution camera is in most cases the better choice, i.e. K3 is the camera you want.

Cheers.
Forum: Sold Items 08-17-2016, 06:53 AM  
For Sale - Sold: Vivitar 55mm 2.8 1:1 macro M42 - screwmount lens
Posted By ramuk
Replies: 3
Views: 1,021
PentaxForums.com Marketplace Listing

Item for Sale
Vivitar 55mm 2.8 1:1 macro M42 - screwmount lens

Asking Price

Item Location
Texas (United States)

Item Description
This is a 1:1 55mm macro lens by Vivitar (made by Komine). The lens itself is in excellent cosmetic and optical condition. The focus ring and the aperture blades work at they should. The glass is clean without blemishes.

This 55mm macro has a couple of features that make it a lens to consider:

1. It is a 1:1 macro while others are 1:2.
2. It is a fast lens. At 2.8 while the corners are not the sharpest, the center is perfectly good. The 2.8 aperture also makes manual focus easier because of the light available.

Like most other good manual focus lens, the focus ring is responsive and a joy to use.

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

Are you selling or trading this item?
Selling

Item Condition (Key)
Used
Like New

Shipping Destinations
Continental U.S. Only

Shipping Charge
12

Shipping Services
USPS

Accepted Payment Types
PayPal

Return Policy & Additional Details
Will accept returns if not as described and if notified within 5 days. Buyer pays shipping.

Please send me a private message if interested in the item!
Forum: Pentax Mirrorless Cameras 08-13-2016, 01:54 PM  
New MILC coming??
Posted By ramuk
Replies: 59
Views: 8,669
Yes, yes, yes. Can't agree more. With this feature auto-iso would work on the M mode.

Cheers.
Forum: Pentax Mirrorless Cameras 08-12-2016, 11:15 PM  
New MILC coming??
Posted By ramuk
Replies: 59
Views: 8,669
Seconded. An EVF even on the same form factor as the k3/k70 will be great for low light and my fast manual focus lenses. If wishes were horses .... :)
Forum: Pentax SLR Lens Discussion 08-12-2016, 09:08 AM  
Prime lenses for film
Posted By ramuk
Replies: 10
Views: 681
I assume you are referring to a film camera that does not have autofocus. Also assuming you don't want to use the m42 adapter and m42/screwmount lenses.


All the below lenses are great value for money ....

Pentax smc 55mm 1.8 ---- for a fast 50mm with great rendering.

Pentax-m 50mm f4 macro --- for a macro lens that's sharp and light.

Pentax 28mm 3.5 -- a wide angle lens that's sharp fully open.

Tokina 90mm 2.5/ vivitar series 1 90m 2.5 --- great portrait lens also works as a macro (1:1 with the adapter)

Vivitar 100mm 2.8 macro/Vivitar series 1 105mm 2.5 macro -- 1:1 macro without adapter, legendary for its sharpness

Pentax 135mm 2.5 (not the takumar bayonet)/pentax-m 135mm 3.5 -- the first one for its low light ability, the m series for its compactness.

The list can go on. What's amazing about these lenses is, all of these will work great on any Pentax DSLR including the K1.

Happy shooting.
Forum: Pentax DSLR Discussion 08-05-2016, 11:29 AM  
Advice: Which Older (Cheaper) Pentax Body? (to pair with 50mm 1.2)
Posted By ramuk
Replies: 58
Views: 4,171
I have two thoughts,

1. The lens you have, is worth quite a bit of money. I suspect you can sell the lens and get yourself a nice used k50 + a prime like da 50mm 1.8, a decent zoom like 16-45 and maybe with a little more money get a 55-300 too. That should cover most of your shooting/learning needs.

2. If you really want to use your 50mm 1.2, you need to be able to focus well. Pentax DSLRs with the default focussing screens will not help in using the lens at high apertures. I think the mirrorless cameras are the cost effective solution. A used Samsung nx-30 for example should be gettable for around $225. A pk adapter for around $10. This will allow you to use the 1.2 at 1.4 if not fully open. Sony and Fuji too should have similar equivalents. This setup means you can invest relatively cheap amounts of money for good quality lens (for example old takumar lenses) as long as you are comfortable using manual focus( the evf makes it much easier).

All the best.
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