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Forum: Pentax K-3 07-19-2016, 01:06 AM  
K3 and tamron 70-200
Posted By 5teve
Replies: 3
Views: 818
Thanks Adam and Kiwi

Be interesting to hear from more users - it sounds like the backlash combined with the very fast focus throw of the 70-200 is what causes it. From a bit more testing I am figuring that the following happens

Focus is initiate > Finds focal point but carries on driving focus all the way back > once stop is reached it focused back to its first found point - due to the backlash the point of focus is actually another 1/4 turn of the screw in this direction therefore the focus is out. Manually nudging it with the focus ring on the lens takes up the slack and brings it back into focus.

It looks like either the tamron is not compatible (and as its still being sold probably still isnt), I have excessive wear in the gearbox (there are only 3 gears) or the drive shaft / mechanism or the focus algorithm in the camera is wrong for this lens - its also very slow to focus compared to the one pentax lens i have! - PDAF seems fast and also throws the focus back and forth a lot while getting the focus right - which probably takes up the backlash enough.

If anyone else can chime in with their findings i'd greatly appreciate it. It looks like I may be saving up for some non screw drive lens's which leaves me with Pentax ($$) or second hand sigma - which are hit and miss in the 70-200 range

Steve
Forum: Pentax K-3 07-18-2016, 06:58 PM  
K3 and tamron 70-200
Posted By 5teve
Replies: 3
Views: 818
Hi Guys

I posted a thread a good while ago about the K3 and my Tamron 70-200 having issues focusing in Live view at distance. I don't use live view much but it effects video too.

the subject is quite badly out of focus and I have done some more investigation into this.

What I have found is that there is about a 1/4 turn backlash on the lens screw drive - when using normal phase detect the hunting seems to cope with this although may explain the slight oof images i get sometimes - when using live view / video the slow contrast detection seems to rack all the way back and then in again and then stop - but always stops out of focus. If i have the lens focus on MF (is engage the MF ring on the lens) and give it a very slight twist - it brings it back in focus properly. I think the very short throw this lens has is causing the issue when combined with the backlash.

Has anyone got a 70-200 they can check with this please - and also check the backlash on the screw thread - i just used a small flat screw driver and observed how much of a turn there was with no resistance.

Thanks in advance

Steve
Forum: Pentax K-3 08-19-2015, 06:18 PM  
My über-brief K-3 II review
Posted By 5teve
Replies: 22
Views: 3,134
Re lens compatibility (admittedly on a K3) , I have a tamron 70-200 and in liveview its focus is a mile off.. but with normal focusing, i have dialled it in fairly well with a -2 adjustment. neither of my tamrons 28-75 or 70-200 seem to focus quite like my 16-45 pentax. the pentax is real quick, the tamrons are much faster than on my k20, but liveview focus sucks with them, but not with the pentax.

Tamron have been contacted and dont want to know about it.

Steve
Forum: Pentax K-3 04-10-2015, 05:08 PM  
computer buying advice for k3
Posted By 5teve
Replies: 36
Views: 2,597
Also if you are going to be spending money on a new (or maybe even consider a high end reconditioned workstation) please have a serious think about backup.

I know so many people who just rely on the internal disk and an external, and then lose everything, all their kids photos, everything.

I have a workstation i'm just building (not recommending it, just explaining how I operate) to replace my old one

It contains 4x SSD's (boot and scratch drives in RAID 1 - Mirrored raid so I can lose 1 drive out of each 2 drive set and rebuild the data)
12x 2tb hard drives in Raid 6 - I can lose any 2 drives from the set - replace them and rebuild the data

I have a separate mini server (HP microserver) running freenas with 5x 3tb hard drives, that receives a backup of all important information (including photos) daily. the 5x hard drives are running RAIDZ (ZFS raid 5 equivalent) so again I can lose a single drive and recover the info by replacing the drive.

The most important stuff from the microserver is then re copied onto a 2tb external drive

Then items like our business stuff is then backed up to drop box or google drive.

My next step will be having a backup system outside of the house in case of fire, but with day time temps in the summer of up to 45degC its proving to be a problem!

So in a very long winded way, what I am saying is serioiusly think about your back up, even if its a preconfigured commercial system such as a synology, qnap, netgear NAS device to back up onto (preferably automated) and some cloud backup

Oh and I also went with the Creative Cloud $9.99 monthly plan as I have been a long time Lightroom user as well as use photoshop quite extensively. I dont need to then pay for upgrades in a lump so my opinion was it was reasonable value.

Just my 2 cents worth

Steve
Forum: Pentax K-3 02-27-2015, 02:19 AM  
Focus issues k3 or lens?
Posted By 5teve
Replies: 19
Views: 2,642
Hi David

Simply switch live view on, set aperture to f2.8 and take a picture of a focus chart at a low angle (as shown in my pictures) - or even simpler something like 5 AA batteries aligned diagonally across the plane of the lens, focus on the middle one (from a distance at 200mm) and take a shot.. see if any are in focus. on mine, depending on the spacing the front or rear would be in focus, but at larger focal distances that mis-focus appears to get into the meters range!

The only time I would use liveview is when i'm getting shots over peoples heads, if using liveview on a tripod I would likely manual focus anyway. I now just have to tweak the focus adjustment for a couple of the lenses to bring the PDAF focus into a better accuracy (this doesnt effect liveview tho)

Thanks

Steve
Forum: Pentax K-3 02-17-2015, 11:04 PM  
Focus issues k3 or lens?
Posted By 5teve
Replies: 19
Views: 2,642
That picture looks fairly sharp to me.. search on here about the softness discussions, more MP demands more from the user, there are quite a few discussions on here about how to help this..

Steve
Forum: Pentax K-3 02-17-2015, 08:53 PM  
Focus issues k3 or lens?
Posted By 5teve
Replies: 19
Views: 2,642
Ok had a reply from Tamron (well the repairer)...

Japan have advised me the A001P and A09P where developed long before live view was implemented and may not focus efficiently when used in live view and have advised to manually focus the lens when using this function. Optically adjusting these lenses can improve resolution which we can do but this will affect focus shift and only Japan has the tool for adjusting the focus shift on the Pentax version lenses, please note though this will not improve live view operation.

So I either manually focus (kind of impossible if I'm using liveview to get over crowds) or just ignore live view on these lenses.

As we only have the choice of the tamron (unless you can find an old decent sigma) 70-200 at a reasonable price, or the new pentax at a very high price, I guess i'm screwed either way!

Just playing with the pentax 16-45 and liveview focus speed is incredibly different (fast) compared to the tamrons... i'll see what i find..

Steve
Forum: Pentax K-3 02-17-2015, 03:39 PM  
Focus issues k3 or lens?
Posted By 5teve
Replies: 19
Views: 2,642
Thanks Guys...

I'm in contact with a tamron repairer over here to see if there is such a thing as firmware updates on the 2 tamrons I have as they are screw drive lens about 4 years old, not the later motor versions (as there are no pentax vesions of these)

CR Kennedy are willing to take the camera and perform a full calibration on it to check it out, and I can get the Lens's set up and re-aligned at the local repairer for a fee. I'll persue the lens option first i think after checking out the 16-45.. will let you know the results of that testing... I may also do a factory reset on the camera... see if that solves anything

Steve

Edit - Would anyone else out there like to test the live view on a tamron lens, especially the 70-200?
Forum: Pentax K-3 02-17-2015, 12:43 AM  
Focus issues k3 or lens?
Posted By 5teve
Replies: 19
Views: 2,642
seems like its a problem for 3rd party lenses. There is a post about a sigma 70-200 that needed a software update for it to work in liveview on the k3. I'm not entirely sure that is the issue tho.

Debating whether to send off to CR Kennedy with my lenses and see what they say. As has been mentioned CDAF is contrast detected by the sensor.. so adjustment should never be required....

What else could cause the issue?

Steve
Forum: Pentax K-3 02-16-2015, 02:22 AM  
Focus issues k3 or lens?
Posted By 5teve
Replies: 19
Views: 2,642
Hi Adam

Sorry I have clarified the wording... all testing was done on my K3.. I just mentioned they were used previously on the k20 as they seemed ok on that.. but need to retest..

Steve
Forum: Pentax K-3 02-15-2015, 09:14 PM  
Focus issues k3 or lens?
Posted By 5teve
Replies: 19
Views: 2,642
Hi Guys

I'm trying to decide if its a camera body (k3) or lens issue here.

I have 2 lenses - Tamron 70-200 F2.8 purchased about 4 years ago and repaired (stiff focus) about 1 year ago. I also have a Tamron 28-75 f2.8 about the same age. Both were used previously with my K20 - of which I'm yet to do some testing on.. all testing was done using the lens on my new(ish) k3

Issue occured over the weekend using the 70-200 f2.8. focus seems a little off but live view focus was literally 10's of meters off at distance!

This of course led me to do some testing with both lenses. Chart was used (a4 sized taped to glass on frame). complete refocus was forced for every shot. centre spot focus used. 3 shots taken of each setup (6 on the case of LV 50mm on the 28-75 due to possible inconsistency) f2.8 used on all shots too. Title shows Live View (LV) or PDAF (PD), focal length and number in series (1, 2or 3) The results can be found:-

Here https://plus.google.com/photos/116282250397201644900/albums/6116283759041406...InQhdKAzsnn_wE for 70-200 - focal distance around 2.5-3m

at 70mm live view - consistent front focus
at 100mm live view - consistent large front focus
at 200mm live view - consistent large front focus

at 70mm PDAF - slight back focus
at 100mm PDAF - front focus
at 200mm PDAF - front focus
At f2.8 the lens looks pretty poor also. Not totally convinced that the repair job was a good one. Opinions on this would be welcome.

Here https://plus.google.com/photos/116282250397201644900/albums/6116275155362064...CKm2uv2X54D8WQ for 28-75 - focal distance around 1.5m

at 28mm live view - looks ok on average
at 50mm live view - front and back focus - not consistent
at 75mm live view - slight back focus on average.

at 28mm PDAF - Large front focus
at 50mm PDAF - variable front focus
at 75mm PDAF - med front focus
At f2.8 this lens looks poor also. Opinions on this would be welcome.

I cannot determine if the camera or lens are likely to be at fault here. The large front focus on the 70-200 explains what I was seeing at the weekend with the actual focus point being in a completely different place!

Your thoughts - direction to go from here etc are very welcome. I do have a 16-45 pentax left to test which i'll do when ii get time..

Steve

Also possibly worthy of note is that in live view with the 70-200 it tends to focus through the range and most of the while does it very slowly right until it reaches the end of the focus range then it snaps back much quicker.
Forum: Pentax K-3 01-08-2015, 10:45 PM  
Pulled the trigger.... k20-k3
Posted By 5teve
Replies: 13
Views: 1,796
OK I can safely say WOW

Although I have not had too much time to play yet (run my own business and Christmas was hectic with family visiting!) I have still had a chance to get some snap shots..

Impressions? You will have heard them all before

Build quality - Feels the same as the k20 - well built and designed. Solid. I have the grip (which I had on all the time oon the k20)
Speed - Wow - just wow - Very quick focus, continuous high is incredible - lenses feel like new lenses - 16-45, tamron 28-75 and Tamron 70-200
Low light focusing - just this alone justifies the purchase - I cover (voluntarily) a few indoor poorly lit social events and the k20 always struggled - the k3 doesnt
High Iso - I've never really shot hi Iso as the k20 was pretty messy - the k3 makes ISO800 seem 'normal' and the noise cleans up in PP incredibly well.
Live view - much better than the K20 but I tend not to use it - handy when you give it to P&S users to take a photo tho!
Flash metering - Much much much better - P-TTL works! - bounce works - distance appears to be greater (mainly due to correct metering) - Using metz 54af2
Battery life - hard to say using 2 batteries, but its seems good enough for my use, probably not as light on power as the K20 tho
Overall image - seems a bit nicer out of the camera - I shoot raw - and on import LR5 shows what I think are fairly pleasing images without much work.
Menus - There is a lot more to get my head around over the k20! - will be handling this over the coming weeks
General button layout - Love the ISO and exp comp buttons - hate the metering mode button (prefer the dial like the k20) as I review the shot go to change the metering method and then nearly delete the picture! I guess its just different to the K20. Still getting used to the info menu layout, but its very similar in principle to Olympus's super control panel (or theirs is like Pentax's) which I have on my XZ2
Shutter - Is it working? :)

Anyway some snapshots..

Pentax 16-45





Pentax 16-45 cropped



Tamron 28-75 cropped




Tamron 70-200 cropped


Forum: Pentax K-3 01-08-2015, 09:55 PM  
14 Year Old Photographer, External Mic Not Working. Please Help
Posted By 5teve
Replies: 8
Views: 1,471
although I know nothing about the k3 video and inputs, as I have only recently received my K3 it sounds like a gain issue, if the shotgun is faintly working if you yell into it? Maybe the Seinheiser mic has a higher output? That doesnt explain why it was working before with the multiple adaptors?

Steve
Forum: Pentax K-3 12-23-2014, 11:08 PM  
k3 and lightroom
Posted By 5teve
Replies: 16
Views: 2,142
Hi Guys

Quick question, i'm on LR4 and not 5 yet.. is LR4 capable of reading the DNG's correctly? I'm assuming i'll need LR5 to read PEF's?

If LR4 can read K3 dng's then I may hold out for LR6 which should be sometime early in the new year I think?

Thanks

Steve
Forum: Pentax K-3 12-15-2014, 02:10 AM  
K-3 Autofocus
Posted By 5teve
Replies: 8
Views: 1,485
Happened on the k20 grip also.. when carrying it around and forgetting I had the grip "on" my palm would inadvertently 'focus' - How does the grip know its not meant to be working if its pressed?

Steve
Forum: Pentax K-3 12-15-2014, 01:18 AM  
Pulled the trigger.... k20-k3
Posted By 5teve
Replies: 13
Views: 1,796
Well its arrived... and i'm not allowed to play as its now a chrissy present. Turned it on an fired a few shots (no card) just to get a very brief fix.. and yes it seems complex (no worries) and quiet (awesome) and well built (good job) but its still in the box! arrghhh..

anyway.. for those of you interested, ordered direct from cr kennedy, with grip for a very good price (not quite BH photo price, but pretty close to the landed and international warranted pricing of BH Photo) it has firmware 1.11 on it and has a serial starting 6045XXX which I cant say I have seen mentioned on here?

I'll give you an update after i'm allowed to 'play'

Thanks for the tips also.. i'm sure i'll get accustomed to the differences!

Steve

---------- Post added 12-15-2014 at 08:22 AM ----------



I'm only on LR4 (but will upgrade) when you are talking camera calibration tab and using the embedded profile are you referring to files save in DNG or PEF as I generally save PEF files...

Thanks

Steve
Forum: Pentax Forums Giveaways 12-13-2014, 09:41 PM  
3 Million Post Giveaway: Confirm your entry!
Posted By 5teve
Replies: 2,854
Views: 79,118
Last in first out...

Confirmed here.. please! Just to go with my shiny new K3...

Steve
Forum: Pentax Price Watch 12-08-2014, 11:49 PM  
K-3 Bundle now $796 at B&H
Posted By 5teve
Replies: 36
Views: 4,242
Ain't that typical.. I hope you guys will thank me for ordering mine locally (Aus) due to me being able to persuade the local distributor to drop the price to close to the landed BH bundle pricing (bidy and grip), It was guaranteed that B&H would bring back the flash deal.. !

Oh well....

Steve
Forum: Pentax K-3 12-08-2014, 06:35 PM  
Pulled the trigger.... k20-k3
Posted By 5teve
Replies: 13
Views: 1,796
Thanks Jatrax - I'm thinking with the K3, i'll start a new catalogue as the existing one is getting a bit heavy and slow (LR4) however i'll see how LR5 handles it.. I always shoot raw, never JPG. I also have an olympus XZ-2 as my underwater camera (in housing of course) when diving so use LR for the raw files from that also. (newb at UW photography, but loving the images this produces)



Layouts don't bother me too much.. I adapt pretty quickly.. the number of settings may throw me tho :) I have been pondering an upgrade for some time.. but the k20 just kept on giving... as I mentioned I do not know what to do with it.. keep it, which i'll be sad if I don't use it.. or sell it, which will make me sad too! I think I am mostly looking forward to the AF improvements.. K20 is not great for indoor, but I have still worked it hard in that scenario.. and Outdoor I have never had a problem with speed.. so it will be interesting to see just how much quicker the k3 is! below picture was taken on the K20 on a rocking boat at 200mm while moving, and he came out of the water pretty quickly! Not very sharp, but the camera was quick enough to get it... so I should get more keepers with the K3 :)

Forum: Pentax K-3 12-08-2014, 06:09 PM  
Pulled the trigger.... k20-k3
Posted By 5teve
Replies: 13
Views: 1,796
After many happy years I am looking to retire my K20.

It has been faultless, although with certain lenses it is now struggling to focus at the wide angle (16-45 / tamron 28/75), it has travelled with me everywhere generally as hand luggage and has copped sea spray when ever it comes out on the boat with us. It has always had the grip attached. It really has been a very trusty camera and creates some amazing shots especially with the tammy 70-200 f2.8 - My favourite lens.. - All up the camera has about 25k shots - certainly not heavy usage compared to some.. i'm unsure whether to sell or keep as a second body..

I have now pulled the trigger on the K3 with grip and flucard pro 8gb - I was going to buy from B&H but CR kennedy have come up with the goods at a slight premium, but not significant, by the time I buy the camera from B&H (with free grip) pay the postage pay the mastercard and bank fees and then pay up for a 3 year squaretrade warranty to get international cover, i'm not too far ahead using B&H. So I have the standard 1 year aussie warranty, local support and an additional 2 year warranty via my credit card cover! I love dealing with B&H, I have nothing but praise for them, but the AUD falling is making imports harder to justify...

Anyway.. looking forward to getting the K3 and climbing the learning curve, and also testing out the new focus speed....

Has anyone got any feedback or tips about the transition from the k20 - k3?

Now to look for LR4-5 upgrade.....

Steve
Forum: Flashes, Lighting, and Studio 09-26-2011, 04:22 PM  
flashes - Studio Strobes & Kits - my options..
Posted By 5teve
Replies: 10
Views: 2,084
Nice pics Rupert...

The issue i found was that unless buying direct from China the postage from the states is a killer for this size gear. I do buy smaller stuff tho.. and postage is very reasonable.

Anyways.. my kit turned up nice and quickly (all but the black muslin but thats on its way as it was out of stock).

First impressions, bearing in mind i havent had time to set them up properly and 'have a play' and i am a newb to all of this...

Stands x 3 - are spring cushion 'fancier' brand stands 2m tall - not greatly great, but not terrible either, they seen pretty solid and have a threaded end for mounting flashes. 3 section steel stands, they fold up below 75cm

Umbrellas - 1 Reflective and 1 shoot through - they are what they are and 90cm (Ref) and 100cm (SThr) across, not the covered type that can do both.

Softbox x1 - 60cm x 60cm - not taken out of the packet yet! but has alloy bowens 's' mount included as its back plate.

Strobes x3 - 'digital' type complete with reflectors 400w/s - Bowens 'S' type mount and lamp protector covers provided - 3m power cables included (not hardwired) 150w modelling lamp included. Strange finish to them but are relatively heavy and feel well built. In use the modelling lamp can be off, proportional to the flash output or at 100%. They have optical triggers and have 6.35mm sync sockets. Adjustment of the strobe is via up / down buttons i beleive there are 6 stops (down to 1/32) of adjustment in 1/10 stop increments (60 steps from low to high) indicated on a red led screen 1.0 (low) to 6.0 (high). They mount on the stands reasonably well, but can wobble a little if not tightened (large clearance between stand shaft and strobe bore) - Output is huge (i'm new to this)

Yongnuo ctr-301p - 1 trigger and 3 receivers - all work out of the packet even at 1/180 sync speed. included 2.5 - 6.35 sync cable each

Sync cables - 2 provided at 3m long - pc sync to 6.35

Bag - nice bag, no branding, BUT not quite big enough to fit the kit in... if you include the reflectors, without them... just the right size.

Other stuff

120cm octagon softbox - horrible to build - great to take down! diffuses light very nicely.. has alloy bowens s mount - not much else to say!

Backdrop kits - Looks pretty sturdy - not had the muslin out of the packet yet however... so will comment on that later if its thinner than tissue paper! :)

All in all i'm happy with what amounts to a huge amount (and heavy) lot of kit - it works as it says (in the limited what does what testing i did!)- the service from protog was excellent so i will be using them again and again..

A decent 'budget' kit from an aussie based company providing good product bought in from China

Steve
Forum: Flashes, Lighting, and Studio 09-19-2011, 04:10 PM  
Need a Starter Light Kit
Posted By 5teve
Replies: 20
Views: 3,076
They are usually refered to as hot lights (tunsgten type) as they throw out lots and lots of heat and not a great deal of light compared to a strobe. The flouro lights are better heat wise but most comments i have seen relating to continuous lighting suggest they are best for video due to the poor light output for stills.

I'm just going through the process, and have bought a studio strobe kit. I intend in the longer term to add yongnuo flashes to this also to make a portable solution.

Steve
Forum: Flashes, Lighting, and Studio 09-18-2011, 03:30 AM  
flashes - Studio Strobes & Kits - my options..
Posted By 5teve
Replies: 10
Views: 2,084
thanks for the info... the strobe kit i am looking at it about the same price (pro rata), but i get an extra strobe, i also dont get killed by postage as Adorama seem to be quite hefty on the shipping to Aus.

I will check out the seamless details you have suggested as i am now looking at the setup etc so i can start to learn..

Steve
Forum: Flashes, Lighting, and Studio 09-18-2011, 03:25 AM  
flashes - Studio Strobes & Kits - my options..
Posted By 5teve
Replies: 10
Views: 2,084
Hi Bob

Certainly, its "protog" do a search and you will find them, limited range at the mo but will get better. I assume they buy them in from China, but they arent being greedy!

The company is related to Jeff Servaas who had a website related to his name specialising in batteries and flashlights (torches) and have a very very good rep. Interestingly they also have a kx and kr that i think it maybe jeff uses, so can confirm or are willing to test compatibilities. I dont think there are many people that know more about batteries etc than Jeff.

I will support local where i can, but generally i cant justify the cost difference!

Steve
Forum: Flashes, Lighting, and Studio 09-17-2011, 08:41 AM  
flashes - Studio Strobes & Kits - my options..
Posted By 5teve
Replies: 10
Views: 2,084
Hi guys

thanks for the replies.. appreciate them!

Ok i think the route i am going to take is studio strobes.. and i have found (via ebay but not using ebay) an aussie based company that sell strobe kits etc. they seem fairly reasonable, well priced (not as cheap but not as nasty either!) I can speak to them on the phone and they have a good reputation (mainly in the battery industry but they are now doing camera gear too)

So it looks like i will be getting a 1200w/s kit consisting of 3 x 400w/s strobes, bowen s mount and 5 stop adjustment.
1 reflector brolly, 1 shoot through brolley, one softbox, 3 stands (spring cushioned, 2m) bag, reflectors and ct301 triggers & receivers

Added to this i am getting a backdrop kit consisting of 2 x 3x6m muslins (black and white) and the stand & bag. All pretty close to my $1000 budget, which is impressive for buying 'local' plus i can claim the 10% gst (sales tax) back through the business.

I'm thinking of adding maybe a large octobox and more brollys but dont know if it is worth it? modifiers maybe a barn door, grid etc will be added also as well as a lightmeter (as this saves time!)

the nice thing about this kit is that i can also at some point get the yn560 x 3 and use the same gear if i want a portable / unplugged system.

Regarding the additional stuff.. anything you would recommend? any good reading also about using studio strobes as i'm sure i will be pathetic to start with!

need to get it ordered and then start on 131 products that i will be needing to shoot!

again thanks for the info previously and coming up!

Steve
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